IBM DB2 support for the Django application Framework
ibm_db_django enables access to IBM DB2 from Django applications [http://www.djangoproject.com/]
The adapter has been developed and is supported by IBM
- Python 2.5.
- Django Framework 1.7.x or above.
- IBM_DB driver and IBM_DB_DBI wrapper 1.0 or higher
Install Django as per instructions from the Django [http://docs.djangoproject.com/en/dev/topics/install/#installing-an-official-release website].
- For 1.0.2, you need to apply a patch in django in-order to remove Non-standard SQL generation issue.
- The patch is located at http://code.djangoproject.com/ticket/9862.
- You can extract creation.py file from http://code.djangoproject.com/changeset/9703?format=zip&new=9703 and paste it to /django/db/backends/
- For versions greater than 1.0.2 no patch is required.
$ pip install ibm_db_django
- Ubuntu Linux 7.04 64 bit
- Win64/Win32 bit
- Mac OS
- IBM DB2 Database for Linux, Unix and Windows, version 8.2 or higher.
- Remote connections to z/OS (DB2 UDB for zOS)
- IBM Cloudscape
- Apache Derby
- IBM Informix Cheetah version 11.10 onwards
- Remote connections to i5/OS (iSeries)
- Create a new Django project by executing "django-admin.py startproject myproj".
- Now go to this newly create directory, and edit settings.py file to access DB2.
- In case of nix the steps will be like: {{{ $ django-admin.py startproject myproj $ cd myproj $ vi settings.py }}}
- The settings.py will be like (after adding DB2 properties): {{{ DATABASES = { 'default': { 'ENGINE' : 'ibm_db_django', 'NAME' : 'mydb', 'USER' : 'db2inst1', 'PASSWORD' : 'ibmdb2', 'HOST' : 'localhost', 'PORT' : '50000', 'PCONNECT' : True, #Optional property, default is false } } }}}
- To enable DB2 support you need to set value of DATABASE_ENGINE to 'ibm_db_django' in settings.py.
- In the tuple INSTALLED_APPS in settings.py add the following lines: {{{ 'django.contrib.flatpages', 'django.contrib.redirects', 'django.contrib.comments', 'django.contrib.admin', }}}
- Next step is to run a simple test suite. To do this just execute following command in the project we created earlier: {{{ $ python manage.py test #for Django-1.5.x or older $ Python manage.py test django.contrib.auth #For Django-1.6.x onwards, since test discovery behavior have changed }}}
- For Windows, steps are same as above. In case of editing settings.py file, use notepad (or any other) editor.
- Django by default executes without transactions i.e. in auto-commit mode. This default is generally not what you want in web-applications. [http://docs.djangoproject.com/en/dev/topics/db/transactions/ Remember to turn on transaction support in Django]
- Non-standard SQL queries are not supported. e.g. "SELECT ? FROM TAB1"
- dbshell will not work if server is remote and client is DB2 thin client.
- For updations involving primary/foreign key references, the entries should be made in correct order. Integrity check is always on and thus the primary keys referenced by the foreign keys in the referencing tables should always exist in the parent table.
- DB2 Timestamps do not support timezone aware information. Thus a Datetime field including tzinfo(timezone aware info) would fail.
Your feedback is very much appreciated and expected through project ibm-db:
- ibm-db_django discuss : http://groups.google.com/group/ibm_db
- ibm-db issues reports: https://github.com/ibmdb/python-ibmdb/issues
See CONTRIBUTING
The developer sign-off should include the reference to the DCO in remarks(example below): DCO 1.1 Signed-off-by: Random J Developer [email protected]