Hard coded url in your Django template html files or views.py file is a bad practice. Because it is difficult to maintain url changes. If you change one url, you may need to change that url in a lot of pages. So Django provide template url tag and reverse function for you to avoid hard …
How To Use Django url Tag And reverse() Function To Avoid Url Hard Coded Read More »
Pass parameters via URL in Django is not as same as java or Php which use a question mark and key-value pairs ( for example http://127.0.0.1:8080/login.jsp?username=jerry&password=12345678). Django uses a more clear, readable, and SEO-friendly way to pass parameters in URL like http://127.0.0.1:8080/login/jerry/12345678. The first section after login is the username, and the section after jerry …
How To Pass Parameters To View Via Url In Django Read More »
We have learned how to add many to many fields for Django models in the article How To Operate Foreign Key And Many To Many Field In Django Model. But when we display the many to many field values ( in this example is the Employee’s Department values ) in Django Html template page, we …
How To Get Many To Many Model Field Values In Django View Read More »
Django view is just a python function defined in the Django project / app_name / views.py file. The view function will receive and process user request ( generally get model data from backend database table ) and then return a HttpResponse object with a html template. The model data is passed back to the client …
How To Retrieve Model Data Use get_list_or_404 And get_object_or_404 Shortcut Function Read More »
Django model provide an easy way for ORM( object relational mapping) management, with it you even do not need to write sql command. But sometimes you realy need to write your own sql command to improve sql performance or special use case. This example will show you how to run raw sql or get queryset …
You have learnd how to use Django model manager’s filter or exclude method to get query result data in article Django Simple CRUD Operation Example. To use filter method is so easy as below. Department.objects.filter(dept_desc__contains=’dev2qa’) <QuerySet [<Department: Development,Develop dev2qa.com website use Django>]> We can see that the filter function’s argument is dept_desc__contains=’dev2qa’, i think this is not difficult …
What Does Double Underscore ( __ ) Means In Django Model QuerySet Objects Filter Method Read More »
We all know that model data operation in Django is so easy, you do not need to write any sql command at all, what you need to do is just use model class’s attribute objects ‘s methods to create, query, update and delete mode data records in backend database table like below. Suppose our model …
How To Create And Use Custom Model Managers In Django Read More »
