peterfarrell

1. generate an empty migration
2. move the migration from old_app to new_app
3. edit the migration file to change all instances of old_app to new_app
4. add a forward migration to rename the table from something to something_else
5. add a backward migration to do the opposite
6. move models.py from old_app to new_app
7. apply the migration

peterfarrell

from selenium import webdriver


def select_from_chosen(driver, id, value):
    chosen = driver.find_element_by_id(id + '_chzn')
    results = chosen.find_elements_by_css_selector(".chzn-results li")

    found = False
    for result in results:
        if result.text == value:

peterfarrell

* {
    font-size: 12pt;
    font-family: monospace;
    font-weight: normal;
    font-style: normal;
    text-decoration: none;
    color: black;
    cursor: default;
}

peterfarrell

(function( $ ) {
        $.fn.simulateDragDrop = function(options) {
                return this.each(function() {
                        new $.simulateDragDrop(this, options);
                });
        };
        $.simulateDragDrop = function(elem, options) {
                this.options = options;
                this.simulateEvent(elem, options);
        };

peterfarrell

# Written by Senko Rasic <[email protected]>
# Released into Public Domain. Use it as you like.

from django.db import models


class SingletonModel(models.Model):
    """Singleton Django Model

    Ensures there's always only one entry in the database, and can fix the

peterfarrell

# Problem:
#
# If you use git submodules linking two private github repos, you'll need to create a separate deploy key for each.
# Multiple keys are not supported by Ansible, nor does ansible (when running git module) resort to your `.ssh/config` file.
# This means your ansible playbook will hang in this case.
#
# You can however use the ansible git module to checkout your repo in multiple steps, like this:
#
- hosts: webserver
  vars:

peterfarrell

Workflows (States) in Django

I'm going to cover a simple, but effective, utility for managing state and transitions (aka workflow). We often need to store the state (status) of a model and it should only be in one state at a time.

Common Software Uses

• Publishing (Draft->Approved->Published->Expired->Deleted)

peterfarrell

class CustomTask(Task):
    def on_failure(self, exc, task_id, args, kwargs, einfo):
        info = '[{0}] failed: {1}'.format(task_id, exc)
        logger.exception(info, exc_info=exc)
        super(CustomTask, self).on_failure(exc, task_id, args, kwargs, einfo)

    def on_success(self, retval, task_id, args, kwargs):
        global app
        if app.is_warm_shutdown:
            app.consumer.connection._default_channel.do_restore = False

peterfarrell

# coding: utf-8
from __future__ import unicode_literals
import os
from pdfminer.pdfdocument import PDFEncryptionError

from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
from cStringIO import StringIO