This is a cheatsheet created by @bobbyong and @johnking7 to improve our productivity while working on a Django freelance project. Feel free to use or improve this document wherever you see fit. :)
Start Project:
django-admin.py startproject <projectname>
Run Server:
python manage.py runserver
Start App:
python manage.py startapp <appname>
Sync Database (Create tables for first time use):
python manage.py syncdb
Declare Required Python Modules:
pip freeze > requirements.txt
Django Boilerplates
Code to Enable Local Path Discovery (include in settings.py):
import os
SITE_ROOT = os.path.realpath(os.path.dirname(__file__))
RequestContext for Correct User Authentication in Templates (include in an app's views.py): Detailed Write-up: http://bobbyong.com/blog/simple-newbie-django-requestcontext-mistake/
from django.template import RequestContext
def my_view(request):
# View code here…
return render_to_response(‘my_template.html’,
{'dictionary key 1': dictionary value 1,
'dictionary key 2': dictionary value 2,},
context_instance=RequestContext(request))
Properly Display Database Objects as Unicode (include in models.py - example below):
class Blog(models.Model):
name = models.CharField(max_length=100)
tagline = models.TextField()
def __unicode__(self):
return self.name
To list git commands:
git --help
To get specific help on a command (e.g. checkout)
git checkout --help
Basic Git
Check status:
git status
Add files:
git add .
Add modified tracked files and deleted files to the staging area
git add -u
Remove files:
git rm <file path eg: templates/index.html>
Commit files:
git commit -m "Commit Message"
Add and commit git changes with a message:
git commit -am “message here”
Push to remote:
git push <remote name> <branch name>
Pull from remote:
git pull <remote name> <branch name>
Remote
Check Git Remote:
git remote
git remote -v (to check URL of git remote alias)
Add New Remote:
git remote add <git name. Example: origin> <git URL ending with .git>
Remove Git Remote:
git remote rm <git name. Example: origin>
Branching
To create new branch locally
git branch <new branch name>
To create a new branch locally and switch to it
git checkout -b <new branch name>
To switch branches
git checkout <branch name e.g. master>
To view local branches
git branch
To view local and remote branches
git branch -a
To push to a new branch called "newFeature" (assuming your remote is named origin)
git push origin newFeature
To rename a branch
git branch -m <old branch name> <new branch name>
To delete a branch
git branch -d <branch name>
To merge a branch 'bugFix' into a single sequential commit under 'master'
git rebase master --> merges branch bugFix into a single line of commit
git rebase bugFix --> brings master onto the latest version
Additionally that will create the remote branch if it doesn't already exist
Generally commit files to the branch you're working on before switching otherwise it gets confusing. For example if you add a new file (newfile.txt) to a branch called "newFeature", then checkout your master branch, you will see newfile.txt as an unstaged commit. Which, if there's a lot going on, could mean that it gets committed to master not the other branch called "newFeature". However if you're on branch "newFeature", commit the changes, then switch to master and run "ls" you won't see newfile.txt (yay), meaning you can't accidentally commit it to the master branch.
Checkout
To revert a file from modified to latest commit version (original)
git checkout -- <filename>
To discard changes for everything below the current working directory
git checkout -- .
To discard changes for everything
git checkout HEAD
Undo Changes
Undo a local commit as if it never happens
git reset HEAD~1
Create a new commit that essentially reverses all the changes of the previous commit (for remote uses)
git revert HEAD
Others
Credential Caching Tool on Windows (save typing username & password): https://github.com/blog/1104-credential-caching-for-wrist-friendly-git-usage
Graphical Repository Viewer
gtk
From there you can open git-gui (for some reason git-gui as a standalone command isn't working for me)
To show commit history:
git log & git reflog (reflog shows checkouts)
To move back 1 commit:
git reset --hard HEAD@{1}
Or to move back to a previous commit type reflog - check the hash next to the commit you want then type
git reset --hard <appropriate hash>
Login to Heroku:
heroku login
Run One-off Heroku Commands:
heroku run <subsequent commands. Example: python manage.py syncdb>
Run One-off Heroku Commands when There are Multiple Heroku Apps:
heroku run python manage.py syncdb --remote <Heroku remote name (not Heroku app name). Example: production>
Check State of Dynos:
heroku ps
Rollback a Bad Commit:
heroku rollback
Review Logs:
heroku logs
Open App on Browser:
heroku open
To push a local branch other than master to Heroku master branch:
git push heroku <local branch name>:master
After Installing South:
python manage.py syncdb
Initial South Migration (New App):
python manage.py schemamigration <appname> --initial
python manage.py migrate <appname>
Subsequently App Migrations:
python manage.py schemamigration <appname> --auto
python manage.py migrate <appname>
Converting an Existing App to South:
python manage.py convert_to_south <appname>
Subsequently App Migrations:
python manage.py schemamigration <appname> --auto
python manage.py migrate <appname>
Step-by-Step Tutorial:
http://bobbyong.com/blog/step-by-step-guide-on-configuring-django-userena/
Step-by-Step Tutorial on Installing PostgreSQL on Windows:
http://bobbyong.com/blog/installing-postgresql-on-windoes/
Create Database: createdb
Change PostgreSQL Root User Password:
psql
Password: (oldpassword)
ALTER USER postgres WITH PASSWORD 'newpassword';
psql
Password: (newpassword)
Check Python version - enter into python shell by typing "python" then
import sys
sys.version
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