toledano's questions

I want to use JavaFx components inside a JFrameJava Swing. The application is one JFramewhere there is a button that launches another JFrame, in which you placed a JFXPanelto show other JavaFX components.

So, I have this class where it is located main():

package JavaGUIPackage;

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JLabel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import static javax.swing.JFrame.EXIT_ON_CLOSE;

public class EjemploJavaGUI extends JFrame {

    private final JLabel lblTitle;
    private final JButton btnJFX;
    private final LanzarVentana lanzarVentana;

    public EjemploJavaGUI() {
        setTitle("Ejemplos de GUI ");
        setSize(400, 190);
        setLocationRelativeTo(null);
        getContentPane().setLayout(null);
        
        lanzarVentana = new LanzarVentana();

        this.lblTitle = new JLabel("Seleccione un Framework");
        this.lblTitle.setBounds(20, 20, 300, 20);
        getContentPane().add(this.lblTitle);

        this.btnJFX = new JButton("JavaFX");
        this.btnJFX.setBounds(20 + 100 + 20, 70, 100, 40);
        this.btnJFX.addActionListener(lanzarVentana);
        getContentPane().add(this.btnJFX);

        setDefaultCloseOperation(EXIT_ON_CLOSE);
    }
    
    public class LanzarVentana implements ActionListener {
        
        private String botonPresionado;

        @Override
        public void actionPerformed(ActionEvent e) {
            this.botonPresionado = e.getActionCommand();

            switch(this.botonPresionado) {
                case "JavaFX" -> JFXFramework.prender();
            }
        }  
    }    

    public static void main(String[] args) {
        EjemploJavaGUI ejemplo= new EjemploJavaGUI();
        ejemplo.setVisible(true);
    }
}

JFXFrameworkI took the class from the Java documentation . I just removed the class main()so I can call it from the main class:

package JavaGUIPackage;

import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class JFXFramework {
    
    public JFXFramework() {}
    
    private static void initAndShowGUI() {
        // This method is invoked on the EDT thread
        JFrame frame = new JFrame("Swing and JavaFX");
        final JFXPanel fxPanel = new JFXPanel();
        frame.add(fxPanel);
        frame.setSize(300, 200);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Platform.runLater(new Runnable() {
            @Override
            public void run() {
                initFX(fxPanel);
            }
       });
    }

    private static void initFX(JFXPanel fxPanel) {
        // This method is invoked on the JavaFX thread
        Scene scene = createScene();
        fxPanel.setScene(scene);
    }

    private static Scene createScene() {
        Group  root  =  new  Group();
        Scene  scene  =  new  Scene(root, Color.ALICEBLUE);
        Text  text  =  new  Text();
        
        text.setX(40);
        text.setY(100);
        text.setFont(new Font(25));
        text.setText("Welcome JavaFX!");

        root.getChildren().add(text);

        return (scene);
    }
    
    public static void prender() {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                initAndShowGUI();
            }
        });
    }
}

The program compiles without errors, but when I press the button, I get this error:

mar. 21, 2021 1:25:22 P. M. com.sun.javafx.application.PlatformImpl startup
WARNING: Unsupported JavaFX configuration: classes were loaded from 'unnamed module @5c7ea94e'
Graphics Device initialization failed for :  d3d, sw
Error initializing QuantumRenderer: no suitable pipeline found
java.lang.RuntimeException: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found
    at com.sun.javafx.tk.quantum.QuantumRenderer.getInstance(QuantumRenderer.java:280)
    at com.sun.javafx.tk.quantum.QuantumToolkit.init(QuantumToolkit.java:244)
    at com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:261)
    at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:286)
    at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:160)
    at javafx.embed.swing.JFXPanel.lambda$initFx$1(JFXPanel.java:224)
    at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.lang.RuntimeException: Error initializing QuantumRenderer: no suitable pipeline found
    at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.init(QuantumRenderer.java:94)
    at com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:124)
    ... 1 more
Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: No toolkit found
    at com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:273)
    at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:286)
    at com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:160)
    at javafx.embed.swing.JFXPanel.lambda$initFx$1(JFXPanel.java:224)
    at java.base/java.lang.Thread.run(Thread.java:832)

I put the javafx jar files in a folder next to src in the netbeans project, like this:

Then I added them to the project library, being as follows:

What do I need to modify to display my program correctly?

I'm creating a function that converts minutes to hours and minutes, but I'm doing it this way:

public String duracion(int tiempo) {
  int horas = tiempo / 60;
  int minutos = tiempo % 60;
  return horas + " hrs. " + minutos + " min.";
}

what I want is to return this string:

  return ("%d:%02d", horas, minutos);

But I get the error:

Syntax error on token "return", Name expected after this token

But if I use the expression ("%d:%02d", horas, minutos)with System.out.printlnif it works, but I don't want a function void, I want it to return the text string.

I am changing an exercise that creates a linked list of integers to a linked list of strings. But I have an error in the method push(), which I have adapted from the original exercise that does work.

I have a linked list defined like this:

typedef struct nombreLista {
  char nombre[50];
  struct nombreLista* siguiente;
} Nombre;

I create the variables I need, for the list and the index of the list:

Nombre *pNombres;
int size;

Next I initialize the list:

void init() {
  pNombres = NULL;
  size = 0;
}

Now, I have this function to put an element in the list, it receives a name as a parameter and tries to insert this data in the list, returning 0 on success and -1 on failure.

int push(char dato[50]) {
  Nombre* nodo = (Nombre *)malloc(sizeof(Nombre)); // No sé que hace esta línea
  if (nodo != NULL) {
    nodo->nombre = dato;
    nodo->siguiente = pNombres;
    pNombres = nodo;
    size++;
    return 0;
  } else {
    printf("No se pudo agregar el nombre");
    return -1;
  }
}

I get a compile error:

error C2106: '=': el operando izquierdo debe ser valor L

The IDE displays the error on the line nodo->nombre = dato;with the legend la expresión debe ser un valor L modificable. The compiler is that it comes with Visual Studio 2019.

What does the error mean and how can I fix it? Additionally, what does the line do Nombre* nodo = (Nombre *)malloc(sizeof(Nombre));?

I'm adding unit tests to my blog and I can't pass the test that it should pass .

The proof is this:

from django.test import TestCase
from django.urls import resolve
from apps.blog.views import EntryList

class ApiRootTest(TestCase):
    def test_la_portada_apunta_a_entrylist_view(self):
        found = resolve('/')
        self.assertEqual(found.func, EntryList.as_view())

It's very simple, I want to prove that the root points to the CBV EntryList, which is more or less like this:

from django.views.generic import ListView
from apps.blog.models import Entry

class EntryList(ListView):
    model = Entry

And in the file urls.pythe root points to that class:

from django.conf.urls import url

    urlpatterns = [
        url(r'^$', EntryList.as_view(), name='index')
    ]

When running this I get this error:

 $ python manage.py test
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
F
======================================================================
FAIL: test_la_portada_apunta_a_entrylist_view (src.apps.blog.tests.ApiRootTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Volumes/datos/Proyectos/nspaces/src/apps/blog/tests.py", line 11, in test_la_portada_apunta_a_entrylist_view
    self.assertEqual(found.func, EntryList.as_view())
AssertionError: <function EntryList at 0x11010dd08> != <function EntryList at 0x10fe1dea0>

----------------------------------------------------------------------
Ran 1 test in 0.004s

I don't understand why two instances of the class are created EntryList, instead of just one, which would make my test pass Ok.

What changes do I need to make to pass the unit test?

Plus: what am I doing wrong?

When moving my blog from WordPress to Django I changed the structure of the permalinks, before it was not used categoryin the structure and now it is. More or less so:

/slug/ ⟼ /cat/slug/

And so I'm getting a lot of 404 errors, because Django only searches on category. So I decided to add a finder in the class-based view of the categories:

class CategoryDetail(ListView, CacheMixin):
    model = Entry
    paginate_by = 6

    def get_queryset(self):
        self.cat = get_object_or_404(Category, slug=self.kwargs['slug'])
        return Entry.objects.filter(
            category=self.cat, status=Entry.LIVE_STATUS).select_related() \
            .order_by('-pub_date', 'id')

In the function get_querysetI want to add a redirect that calls the class EntryDetailif the slugcorresponds to an entry and not a category.

I do it like this:

def get_queryset(self):
    try:
        entry = Entry.objects.get(slug=self.kwargs['slug'])
        return redirect(entry)
    except Entry.DoesNotExist:
        pass
    self.cat = get_object_or_404(Category, slug=self.kwargs['slug'])
    return Entry.objects.filter(
        category=self.cat, status=Entry.LIVE_STATUS).select_related() \
        .order_by('-pub_date', 'id')

I use the slugto search for the input (if it doesn't find it , I catch the exception DoesNotExistand go on to find the category) and if that entry exists, I redirect the request to the indicated input, which contains the property get_absolute_url()as indicated in the documentation with return redirect(entry). But it does not work.

It also doesn't work if I use this form of redirect, which matches the URL pattern:

# En urls.py: 
# url(r'^(?P<cat>[-\w]+)/(?P<slug>[-\w]+)/$', EntryDetail.as_view(), name="entry_detail")    
return redirect('entry_detail', cat=entry.category, slug=entry.slug)

The problem, in both cases, is that I get the following error:

TypeError at /el-circulo/
object of type 'HttpResponseRedirect' has no len()

The function len()is used for paging, because I keep sending the response to the CBV CategoryDetail.

How can I get the wording I need to work?

That is, how can I leave the class that was called by the request and return the response with a different class, in this case with EntryDetail.

TL;DR

How to run a script in an iframe on an ⚡️AMP page so that it reads an attribute in the parent window.

I'm trying to run a script in an iframe on an Accelerated Mobile Pages page but I'm getting an error in Google Chrome:

disqus-v1.0.10.html:27 Uncaught DOMException: Blocked a frame
with origin "https://media.toledano.org" from accessing a cross-origin
frame. at https://media.toledano.org/assets/js/disqus-v1.0.10.html:27:40

In Safari the error is this:

SecurityError (DOM Exception 18): Blocked a frame with origin
"https://media.toledano.org" from accessing a frame with origin 
"https://yo.toledano.org". Protocols, domains, and ports must match.

The line with the problem looks for the value of an attribute on a specific element:

window.parent.document.getElementById('content').attributes["data-idx"].value}

The idea is that I load the iframe into a page and the script that contains the iframe looks for a line like this:

<main id="content" role="main" class="" data-idx="d09a0882-74a2-4d66-97d8-63e37172a1b4">

If I only use document.getElementById('content').attributes["data-idx"].value}the result is null, because the iframe refers to itself (ie media), that's why I refer to parent(ie yo).

Note

I don't understand on which side this CORS works so on both sides I added the permissions headers.

According to me, the headers work... I make a request asking for the headers and I can see that they work.

Test 1.- Origin: me - Destination: media ( yo-> media)

> $ curl -I -s -X GET -H "Origin: yo.toledano.org" https://media.toledano.org
HTTP/1.1 200 OK
Content-Type: text/html
Content-Length: 0
Connection: keep-alive
Date: Tue, 01 Aug 2017 16:50:37 GMT
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, PUT, POST, DELETE, HEAD
Access-Control-Max-Age: 3000
Last-Modified: Fri, 14 Aug 2015 22:03:34 GMT
ETag: "d41d8cd98f00b204e9800998ecf8427e"
Accept-Ranges: bytes
Server: AmazonS3
Vary: Origin
Age: 2632
X-Cache: Hit from cloudfront
Via: 1.1 64184371bdc0c4545cde799b5949d17c.cloudfront.net (CloudFront)
X-Amz-Cf-Id: 0TmdSyBCGXHdRhFoykbzGJiOG6TN1GbdLkGFn13fUdtDOTc3GIMCZA==

The header Access-Control-Allow-Originis present, as expected.

Test 2.- Media origin, destination yo ( media-> yo)

$ curl -I -s -X GET -H "Origin: media.toledano.org" https://yo.toledano.org
HTTP/1.1 200 OK
Server: nginx/1.10.3 (Ubuntu)
Date: Tue, 01 Aug 2017 17:36:26 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 19630
Connection: keep-alive
Vary: Accept-Encoding
Expires: Tue, 01 Aug 2017 17:38:23 GMT
Cache-Control: max-age=600
X-Frame-Options: SAMEORIGIN
Access-Control-Allow-Origin: *
Access-Control-Allow-Origin: toledano.org
Access-Control-Allow-Credentials: true
Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS
Access-Control-Allow-Headers: Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Requested-With

The header Access-Control-Allow-Originis present, as expected.

Exhibit 3, Witness. From Google to me and half ( google.com-> yo; google.com-> media)

$ curl -I -s -X GET -H "Origin: google.com" https://yo.toledano.org
HTTP/1.1 200 OK
# bla bla bla
X-Frame-Options: SAMEORIGIN
Access-Control-Allow-Origin: *
Access-Control-Allow-Origin: toledano.org
Access-Control-Allow-Credentials: true
Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS
Access-Control-Allow-Headers: Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Requested-With

There are the headers... according to me they shouldn't appear... ?

$ curl -I -s -X GET -H "Origin: google.com" https://media.toledano.org
HTTP/1.1 200 OK
# bla bla bla
X-Cache: Hit from cloudfront
Via: 1.1 a658139699129536c4b1341e7df68ce6.cloudfront.net (CloudFront)
X-Amz-Cf-Id: qJUhJ8VxTKvX3yU8toi87DNae41F35_HZKB4M7qwUxky_-Aq0Wrdcg==

They are not here because CloudFront only allows the toledano.org.

Considerations

• The blog is made in Django, with the package django-cors-headerand configuration: CORS_ORIGIN_ALLOW_ALL = True.
• I use Nginx as a web server and add this header to the responses:add_header 'Access-Control-Allow-Origin' 'toledano.org';
• The script is hosted on Amazon S3+Cloudfront and the bucket has the broadest permissions: <AllowedOrigin>*</AllowedOrigin>and the distribution behavior only allows the toledano.org.

What do I have to do to run the script that loads into an iframe on an AMP page to get the value I'm looking for?

• What am I doing wrong? What is my mistake?
• How does CORS work?

Edit: this is a test page: https://yo.toledano.org/desarrollo/grupar-resultados-con-mysql/amp/

Attempt Log

1. I followed the suggestion from @fredyfx's comment and it didn't work.

2. Since I have the idea that the problem is with Nginx, I did this test: a) check if the origin is in the white list; b) if you are activating a variable; c) if the variable is active, activate the headers...

   1. I made a regex to accept my subdomains: https?://(.*\.toledano\.org)(:[0-9]+)?and if it works .

   2. I add this code to the Nginx configuration:

      set $cors '';
      if ($http_origin ~ 'https?://(localhost|127\.0\.0\.1|.*\.toledano\.org)(:[0-9]+)?') {
        set $cors '1';
      }
      

      and add some test headers...

      add_header 'nSpaces-Origen' "$http_origin";
      add_header 'nSPaces-CORS' "$cors";
      

      and the test is correct, I see the header nSpaces-CORS...

      $ curl -I -s -X GET -H "Origin: https://media.toledano.org" https://yo.toledano.org 
      HTTP/1.1 200 OK
      # bla bla bla
      Access-Control-Allow-Origin: *
      nSpaces-Origen: https://media.toledano.org
      nSPaces-CORS: 1
      

   3. So I add this snippet, to activate the rest of the headers...

      if ($cors = '1') {
        add_header 'Access-Control-Allow-Origin' "$http_origin";
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Requested-With';
      }
      

      and the test no longer works! (The result is the same as 2.1).

In the development of my Django project I have a different configuration for production and for development. Both have a common configuration and the settings of each environment go in their respective file.

But this means that they have different requirements. For example, in development I use the package django-debug-toolbarand in production I don't. On the other hand, in production I use the package gunicornand in development I don't.

And just like the project configuration, there are packages that are common to both environments.

But all the packages, currently, are in the same requirements file that was created when I did:

$ pip freeze > requisitos.txt

Then...

How can I divide the requirements of my project, into common requirements, for development and for production.

^{...because I hope it's possible}

I am creating an application for a personal blog and after doing the first migrations and creating the superuser, without any application yet, it occurred to me to modify the user model, so I followed the answer to this question . This is my model:

# coding: utf-8

import uuid
from django.db import models
from django.contrib.auth.models import AbstractUser


class User(AbstractUser):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    bio = models.TextField(max_length=500, blank=True)

    def __str__(self):
        return self.username

Now, I proceed to prepare the tables, creating the initial migration:

manage.py@nspaces > makemigrations users
Migrations for 'users':
  apps/users/migrations/0001_initial.py
    - Create model User
Following files were affected 
 /Volumes/datos/Proyectos/nspaces/src/apps/users/migrations/0001_initial.py

But when applying the migration, I get an error:

manage.py@nspaces > migrate
...
# Muchas líneas para trazabilidad que no importan.
...
File "/Volumes/datos/datos_externos/entornos/datos_externos/nspaces/lib/python3.6/site-packages/django/db/migrations/loader.py", line 298, in check_consistent_history
    connection.alias,
django.db.migrations.exceptions.InconsistentMigrationHistory: Migration admin.0001_initial is applied before its dependency users.0001_initial on database 'default'.

The error says that the migration of adminwhich is a Django core application is applied before its dependency which is users.

What steps do I need to take to migrate from Django's users model to a custom model?

I have a form that generates an object like this:

{
  "documento": 1,
  "origen": 0,
  "descripcion": "FUAR y/o sol. ind. con huella(s) ilegible en el área de solicitud",
  "resolucion": {
    "campo": true,
    "gabinete": false,
    "resguardo": false
  },
  "clave": "a1"
}

I send this object to the function that performs the POST to my server, using axios , very simple, a message in the console and an alert, for the moment.

let _createCausa = (_causa) => axios.post(`${BASEURL}/causas`, _causa)
  .then(_carga => {
    console.log(_carga)
    alert(`Se guardaron los siguientes datos: ${_carga.data.clave} - ${_carga.data.descripcion}`)
  })
  .catch(_error => {
    console.log(_error.response.data)
  })

The first thing the function does is send the data to the API (_causa) => axios.post(`${BASEURL}/causas`, _causa), but I would like that before axios.post()the fields descripciónand clavethey will be passed to uppercase.

But how can I convert just those two fields or properties, before saving them?

I'm having a lot of trouble getting the value of a promise . Basically I want the return value of a promise to be assigned to a variable. For example

This example uses the following elements: vue.js , vuex , almacenis a synonym for localForage, a package for use with local storage.

With this code I get the errorCannot read property 'getItem' of undefined

let _accessToken = this.almacen.getItem('token')

So I use a function .then()and get the same error above

let _accessToken = this.almacen.getItem('token').then(carga => carga)

So I convert my variable _accessTokento a function.

let _accessToken = () => this.almacen.getItem('token').then((carga) => carga)

Here I don't have any syntax errors, but the variable when evaluated returns an error, which says (error during evaluation).

Now if I make a function and use the promise inside, it works. For example:

function _getAccessToken () {
  this.almacen.getItem('token')               // consulto el almacenamiento
    .then((payload) => {                      // obtengo el resultado
      if (payload) {
        this.$store.state.token = payload     // lo guardo en una variable global
        this.$store.state.fuera = false       // altero otra variable
      } else this.$store.state.fuera = true
    }).catch((e) => console.log(`Error ${e}`))
}

Here everything works as expected, but I insist on using my variable, so I add it:

let _accessToken = ''                            // declaro mi variable

function _getAccessToken () {
  this.almacen.getItem('token')
    .then((payload) => {
      if (payload) {
        _accessToken = payload                   // Aqui intento asignar la promesa
        this.$store.state.token = payload
        this.$store.state.fuera = false
      } else this.$store.state.fuera = true
    }).catch((e) => console.log(`Error ${e}`))
}

When evaluating the function, I get an error:
Uncaught TypeError: Cannot read property 'toString' of undefined.

^{The truth is I'm just guessing and I can't get it right.}

How can I save the value of the promise in the indicated variable?

Edit

So that you can see how the application works, I have created a small jsfiddle that reproduces the problem:

https://jsfiddle.net/jstoledano/hjawnnh2/1/

I have an error opening a file in Python, the error is UnicodeEncodeError.

The program opens and processes a file yamlcreated in Windows, but I don't know what encoding it was created with. This issue occurs on both Ubuntu 16.10 and macOS Sierra.

The specific error is:

Traceback (most recent call last):
  File "metas.py", line 75, in <module>
    for meta in metas:
  File "/usr/local/opt/pyenv/versions/metas/lib/python2.7/site-packages/yaml/__init__.py", line 80, in load_all
    loader = Loader(stream)
  File "/usr/local/opt/pyenv/versions/metas/lib/python2.7/site-packages/yaml/loader.py", line 34, in __init__
    Reader.__init__(self, stream)
  File "/usr/local/opt/pyenv/versions/metas/lib/python2.7/site-packages/yaml/reader.py", line 79, in __init__
    self.determine_encoding()
  File "/usr/local/opt/pyenv/versions/metas/lib/python2.7/site-packages/yaml/reader.py", line 135, in determine_encoding
    self.update(1)
  File "/usr/local/opt/pyenv/versions/metas/lib/python2.7/site-packages/yaml/reader.py", line 165, in update
    exc.encoding, exc.reason)
yaml.reader.ReaderError: 'utf8' codec can't decode byte #xf3: invalid continuation byte
  in "<string>", position 273

The file metas.pyis more or less like this:

# coding: utf-8

import yaml
from imp import reload

MIEMBRO = 'JMM'
VERSION = 1.0

import sys
reload(sys)
sys.setdefaultencoding("utf-8")

IMPORTS = """# -*- coding: UTF-8 -*-
from django.conf import settings
from django.db import models
from core.models import Pipol, PUESTOS
from django.contrib.contenttypes.models import ContentType
from django import forms

from metas.models import Evidencia
from metas.models import subir_archivo
from metas.forms import FormEvidenciaBase

from django.contrib.auth import get_user_model
User = get_user_model()

"""

class Generador:

    def __init__(self, meta):
        self.miembro = meta['miembro']
        self.id = meta['id']
        self.nombre = meta['nombre']
        self.repeticiones = meta['repeticiones']
        self.campos = meta['campos']

    def get_campos(self):
        return self.campos

    def get_meta(self):
        return '%s%02d' % (self.miembro.upper(), self.id)

    def get_model(self):
        clase = """class %s(Evidencia):""" % self.get_meta()
        for c in self.get_campos():
            for k, v in c.iteritems():
                blank = u'blank=True, null=True' if v[1] else ''
                clase += u"\n    %s = models.FileField('%s', \
upload_to=subir_archivo, %s)" % (k, v[0], blank)
        clase += u"""\n
    class Meta:
        app_label = 'metas'
        """
        return clase

    def get_form(self):
        clase = """class Formulario%s(FormEvidenciaBase):
    class Meta:
        model = %s\n\n""" % (self.get_meta(), self.get_meta())
        return clase


if __name__ == '__main__':
    file = '%s.yml' % MIEMBRO.lower()
    metas = yaml.load_all(open(file).read())
    print IMPORTS
    for meta in metas:
        m = Generador(meta)
        print(m.get_model())
        print(m.get_form())

The file yamlis something like this:

miembro: vol
id: 1
nombre: u'3 propuestas OE'
repeticiones: 1
campos:
  - correo: ['Correo Electrónico', false]
  - oficio: ['Oficio de cumplimiento', false]
  - propuestas: ['Propuestas', false]
---
miembro: vol
id: 2
nombre: u'Modelo operativo recepción paquetes'
repeticiones: 1
campos:
  - correo: ['Correo Electrónico', false]
  - oficio: ['Oficio de cumplimiento', false]
  - modelo_operativo: ['modelo operativo', false]
  - acuse_entrega: ['acuse', false]
  - observaciones: ['observaciones', true]

The character #xf3corresponds to the ó.

Finally, the premises of my team are the following:

(metas) javier@toledano:Projects/metas_sdk ‹master*›$ locale
LANG="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_CTYPE="UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_ALL=

EDITION

When I do cat archivo.ymlit in the console, this is what it looks like:

miembro: VRL
id: 1
nombre: Entrega CECyRD
repeticiones: 12
campos:
  - acta: ['Acta', false]
  - oficio_acta: ['Oficio Acta', false]
  - oficio_entrega: ['Oficio Entrega', false]
  - correo: ['Correo', false]
  - estad▒stico: ['Estad▒stico', false]

I want to create a fileless branch for an existing repository .

What I have done is this:

• make a new branch
• delete everything (except .gitand .gitignore, that is, the files of my project, not the control files or those generated by the editors)
• dogit add .
• and then docommit

But it looks like a brute force solution to me.

Ask

How do I create a fileless branch of an existing project?

Bonus: My repository is on github , is there a specific way to achieve this for this specific platform? If there is, what is it?

I'm editing a CSS file, I want to override the value of that property, but I don't want to set a new value.

I have file A, which I can't edit .

.menu a {
  padding: 20x;
}

So now I create another style sheet, but if I put

.menu a {
  padding: 0;
}

It doesn't look the way I want. One option is to put another value, like padding: 5px;, but I'm looking for an alternative. When I uncheck that property in Safari's inspector, things look like I expect.

Example:

.caja {
  background-color: indianred;
  padding: 40px;
  font-size: 1.7em;
  color: white;
}

.caja {
  padding: 20px;
}


/* solo cambiar las líneas de abajo */
/* no vale padding: 40px; */
.caja {

}

<div class="caja">
  Quiero que el padding vuelva a ser 40 anulando el <code>padding: 20px;</code>
</div>

How can I disable the property paddingfrom another style sheet?

In this example the effect is achieved using different classes and elements, using unset. It may not be possible with the conditions I intend.

A pip requirements file contains all the installed Python packages, so that file can be used elsewhere and rebuild the original programming environment.

A requirements file looks like this:

alabaster==0.7.9
arrow==0.8.0
awesome-slugify==1.6.5
Babel==2.3.4
binaryornot==0.4.0
blessings==1.6

What I want is to remove the part that indicates the version, in the case of the first line alabaster==0.7.9, remove the part ==0.7.9and leave only alabaster.

I understand that finding a match creates two groups, but I can't get it to work. I am trying it on ubuntu using awk as follows.

1. When I order the first group:

   $ awk -F"==" '{print $1}' base.txt 
   

   I get this:

   alabaster==0.7.9
   arrow==0.8.0
   awesome-slugify==1.6.5
   

   that is, the file is repeated.

2. When I order the second group with

   $ awk -F"==" '{print $2}' base.txt
   

   I only get 50 blank lines.

ADDITION:

Now I search with this pattern (\w+)(==.)with which I make two match groups, I am interested in the first one. But if the package is called python-mimeparsethere is no match anymore . You should be able to add hyphens in case some package is called paquete_pythonorpaquete-python .

Addendum 2

This expression (.+)(==)(.+)finds three groups, the first is the package (which is what I'm looking for) and the third is the version. Now I just need to know how to use it in awk.

third edition

I posted an answer that solves the problem in Python, but the idea is that the solution is applied with some other tool like awk, gawk, sedor even perl.

There are several options in this SOen post , but I haven't been able to use my search pattern on any of them. I get no errors, but no output either.

Some considerations:

• I am looking to get only the package name , not the version
• There is no package installed, so there is nothing to update
• The solution can use another tool, like sedorgrep

I am trying to make a form with angularjs 1.5 to get the token from a server, but when clicking I am not getting any result or error message.

I use AngularUI Router to set the route of the form...

      // otras rutas
      .state('login', {
        url: '/login',
        templateUrl: '/app/auth/_login.form.html',
        controler: 'LoginController',
        controllerAs:'in'
      });
      // otras rutas

And I can display my form correctly:

<!-- Archivo: /app/auth/_login.form.html -->
<div class="row">
  <div class="offset-sm-3 col-sm-6">
    <h2>Formulario de Ingreso</h2>
    <form role="form" name="form">
      <div class="form-group">
        <label for="username">Nombre de Usuario</label>
        <input type="text" data-ng-model="in.credentials.username" name="username" id="username" class="form-control" required />
        <span></span>
      </div>
      <div class="form-group">
        <label for="password">Contraseña</label>
        <input type="password" data-ng-model="in.credentials.password" name="password" class="form-control"  id="password" />
      </div>
      <div class="form-actions">
        <button data-ng-submit="in.login(in.credentials)" type="submit" id="submit" class="btn btn-primary">Ingresar</button>
      </div>
    </form>
  </div>
</div>

In the submit button I establish that when clicked the function is called in.login()with credentialsas a parameter. This is the controller.

(function(angular){
  'use strict';

  function LoginController($scope, $rootScope, auth, session){
    var self = this;
    var _credentials = $scope.credentials;

    var _login = function(_credentials){
      // console.log(_credentials);
      // ^^^^^^^^^^^^^^^^^^^^^^^^^^ Esta línea **nunca se ejecuta**
      auth
        .logIn(_credentials)
        .then(function(){
          _user = session.getUser();
        });
    };

    self.login = _login;
    self.credentials = _credentials;
  }

  LoginController.$inject = ['$scope', '$rootScope', 'auth', 'session'];

  angular.module('cmi')
    .controller('LoginController', LoginController);

})(angular);

The dependencies authand sessionare services that request the Token and save it in LocalStorageand, according to me , its operation is already verified.

Problem

Clicking the Enter button does nothing. There are no error messages in the console and the debug line I put inside _login()never runs.

I would like to know what I am doing wrong and how to correct my error.

The expected result is the following: I type the username and password and press the submit button. These two data are passed to the service auththat sends them to the server that returns a token. But I can't get past the first step.

Thanks.

I use double authentication with GitHub, therefore I use a token that works as a password, but in powershell under windows10 , every time I execute the command git pushor git flow publishit asks me for a username and password.

I have Posh-Git and Git-Flow module installed .

Additional note
I have port 22 blocked so I can only use the https.

Ask

What should I do so that gitit does not request my GitHub username and password anymore?

I am trying to learn angularjs version 1.x using thisinstead of $scope, by doing var vm = this;. In general it works fine, but sometimes, with some functions, I am forced to use $scopefor my code to work.

For this I use thinkster 's tutorial : Building Web Applications with Django and AngularJS and SitePoint 's book , AngularJS: From Newbie to Ninja .

When trying to adapt the code from the book to that used in the thinkster tutorial , I find that I can't always use the variable vm, for example:

In the book the code for an example function is:

angular.module('myApp.controllers', []);

// código eliminado para ahorrar espacio

angular.module('myApp.controllers').controller('StatsController', function($scope) {
  $scope.name = 'World';
  $scope.status = 'Connected';
  $scope.statusColor='green';
  $scope.$on('EVENT_NO_DATA', function(event, data) {
    console.log('received broadcasted event');
    $scope.status = data;
    $scope.statusColor='red';
    $scope.$emit('EVENT_RECEIVED');
}); });

I do the adaptation of this code ( according to my way of understanding it), like this:

(function(){
  'use strict';

  angular.module('myEmit', [
    'myEmit.controllers',
  ]);

  angular.module('myEmit.controllers', [])
    .controller('MessageController', MessageController)
    .controller('StatController', StatController);

  function MessageController($scope, $timeout) {
    var vm = this;
    vm.messages = [{
      sender: 'user1',
        text: 'Mensaje 1'
    }];
    var timer;
    var count = 0;
    vm.loadMessages = function(){
      count++;
      vm.messages.push({
        sender: 'user1',
          text: 'Mensaje aleatorio ' + count
      });
      timer = $timeout(vm.loadMessages, 2000);
      if(count == 3){
        $scope.$broadcast('EVENT_NO_DATA', 'Not Connected');
        $timeout.cancel(timer);
      }
    };
    timer = $timeout(vm.loadMessages, 2000);
    $scope.$on('EVENT_RECEIVED', function(){
      console.log('Received emitted event');
    });
  };

  function StatController($scope) {
    var vm = this;

    vm.name = 'World';
    vm.status = 'Connected';
    vm.statusColor = 'green';
    $scope.$on('EVENT_NO_DATA', function(event, data){
      console.log('Received broadcast event');
      vm.status = data;
      vm.statusColor = 'red';
      $scope.$emit('EVENT_RECEIVED');
    });
  };
  
})();

<!DOCTYPE html>
<html ng-app='myEmit'>
  <head>
    <meta charset="utf-8">
    <title>AngularJS Events</title>
  </head>
  <body ng-controller="MessageController as mc">
    <h4>Mensajes:</h4>
    <ul>
      <li ng-repeat="mensaje in mc.messages">
        {{ mensaje.text }}
      </li>
    </ul>
    <div class="" ng-controller="StatController as sc">
      <h4>Estadísticas: </h4>
      <div class="">
        {{ mc.messages.length}} Mensaje(s)
      </div>
      <div class="">
        Estado: <span style="color: {{ sc.statusColor}}">
          {{ sc.status }}
        </span>
      </div>
    </div>
  </body>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
</html>

Problem

When I try to use this code,

  function StatController($scope) {
    var vm = this;

    vm.name = 'World';
    vm.status = 'Connected';
    vm.statusColor = 'green';
    vm.$on('EVENT_NO_DATA', function(event, data){
      console.log('Received broadcast event');
      vm.status = data;
      vm.statusColor = 'red';
      $scope.$emit('EVENT_RECEIVED');
    });
  };

the controller StatControllerdoes not work because it gives the following error

Error: vm.$on is not a function. (In 'vm.$on', 'vm.$on' is undefined)

That is, it vm.$onis not a function or it is undefined.

Ask

Apparently when I use var vm = this;the the is not passed $scopeto the variable vmand therefore functions like $onare not accessible in my variable vm.

Is there a way to pass the function $scope.onto the variable vm? Could you help me understand how thisvs works $scope?

I'm developing an app using Django 1.9.2 and Python 3.5.1 , but I'm running into a problem trying to configure the project and adjust the frontend theme .

The static files of the theme are inside the application, but the module django.contrib.staticfilesin charge of serving the static files cannot find them.

Setting

This is the static file configuration part. The app coreis where the settings are and provides common elements. The application jitis the one I am developing.

from unipath import Path

STATIC_URL = '/static/'
STATIC_ROOT = PROJECT_DIR.child("assets")
STATICFILES_DIRS = (
    'jit/assets',
)

INSTALLED_APPS += [
    'django.contrib.staticfiles',
    'core',
    'jit'
]

This is the structure of the directories

src
├── assets
│   ├── css
│   ├── fonts
│   └── js
├── bower_components
├── core
├── data
├── jit
│   ├── assets
│   │   ├── css
│   │   ├── fonts
│   │   └── js
│   ├── migrations
│   └── templates
├── node_modules
└── tema
    └── sass

URL patterns

This is the URL search pattern file urls.py:

from django.conf import settings
from django.conf.urls.static import static, url
from jit import views

urlpatterns = [
    url(r'^$', views.home),
]
urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)

the view

The view couldn't be easier.

from django.shortcuts import render

def home(request):
    return render(request, 'jit/index.html')

Template

The template is also very simple:

{% load staticfiles %}
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>Justo a Tiempo</title>
    <link rel="stylesheet" href="{% static 'jit/css/jit.css' %}">
  </head>
  <body>

    <script src="{% static 'jit/js/jit.js' %}"></script>
  </body>
</html>

The error

The error appears when I use {% static 'jit/css/jit.css' %}because it doesn't appear when I use {% static 'css/jit.css' %}. The files exist in both directories.

Page not found (404)
Request Method: GET
Request URL:    http://localhost:8000/static/jit/css/jit.css
Raised by:  django.contrib.staticfiles.views.serve
'jit/css/jit.css' could not be found
You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.

I'm pretty sure this setup works on my work computer, where I use Python 3.4. In any case, I'd appreciate it if you'd let me see my mistake.

I am using gulp.js task manager in my AngularJS and Django project.

Due to my git repository configuration, the static directory, called assetsis not controlled, so I have a directory, sources, where the source files are.

I'm doing a task to copy these files (initially raw, compressed, etc.) to the folder assetsby doing this:

// Configuración
var config = {
  sourcesDir: './sources',
  bowerDir: './bower_components'
    
}

// tarea fuentes
gulp.task('fuentes', function(){
  gulp.src([config.sourcesDir + '/css/styles.css'])
    .pipe(gulp.dest('./assets/css'));
});

That is, a single file moves from the source srcto the destination destseamlessly.

My problem is that I am making angular services with the same Django structure and I have several directories with one or more files inside a javascript folder, like this:

js
├── auth
├── cmi.js
├── indicadores
│   ├── encuestas
│   └── productividad
├── inecap
└── metas

Question: How do I configure my task fuentesto copy the files jsand structure from the source [config.sourcesDir + '/js']to the destination ./assets/js?

I'm learning AngularJS and JavaScript, and following the examples in the book I'm using, I find something I'd like to understand.

I have a controller that performs one of two mathematical operations, depending on which button is pressed: add and multiply.

var controladorApp = angular.module('controladores', []);
controladorApp.controller('controladorConMetodos', function($scope){
  $scope.valor1 = 0;
  $scope.valor2 = 0;

  $scope.sumar = function () {
    $scope.resultado = $scope.valor1 + $scope.valor2;
  };

  $scope.multiplicar = function() {
    $scope.resultado = $scope.valor1 * $scope.valor2;
  }
});

On the web page, I simply call each method with its own button and display the result one line after it. The fields inputare the same for both methods.

<div class="" ng-controller="controladorConMetodos">
  <input type="text" ng-model='valor1'>
  <input type="text" ng-model='valor2'>
  <button type="button" name="sumar" ng-click="sumar()">Sumar</button>
  <button type="button" name="multiplicar" ng-click='multiplicar()'>Multiplicar</button>
  <hr>
  <p>{{ resultado }}</p>
</div>

This is my problem: when I use the method multiplicar(), the result is correct. However, when I call the method sumar()the values ​​are concatenated and not added .

I guess I have to cast , but I'd like to know why (and how). In the book Warrior's Manual they do n't mention this situation, so I guess it's related to my version of AngularJS, the 1.4.9, compared to the one 1.3.2used in the book.