Djongo:django and MongoDB connectors

Using MongoDB as a back-end database in a Django project does not change the Django ORM framework. Implement the Django User management program to add and modify files in the MongoDB database.

Usage

1.pip Install Djongo

2. Add the following code to the setting.py under the Django project:

DATABASES ={

    ‘default‘:{
        ‘ENGINE:‘djongo‘,
        ‘NAME‘:‘your-db-name‘,
              }
           }

3. Run manage.py makemigrations, then run manage.py migrate (required for First data table creation in MongoDB)

4. Complete.
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Requirements:

Version 1.python3.6 and above

2.MongoDB 3.4 and later

3. If a nested query or subquery is used in the project database, such as:

inner_qs =Blog.objects.filter(name__contains=‘Ch‘).values(‘name‘)
entries =Entry.objects.filter(blog__name__in=inner_qs)

Requires MongoDB3.6 and above.

How does it work?

Djongo changes to the Django ORM Framework are very small, which means that there will be no unnecessary errors. It transforms the SQL string query into a mongodb file query. At this point, all Django-related functions, databases, and so on are working like this.

Django's Service module:

‘django.contrib.admin‘,
‘django.contrib.auth‘,
‘django.contrib.sessions‘,

All the others support it.

Usage in Django

The Djongo Connector for MongoDB ensures that you can:--re-use the Django Database/orm framework--work with the original Django variables--Validate your code beforehand--tiny SQL Join operations

Refer to Integrated Django and MongoDB for a more detailed introduction. If your project uses a complex database, you can also get support from an expert.

Adding data files using the Django User Management module

For example, you want to use Django to create a blog platform with MongoDB as a back-end database. Define the blog data table under your blog project app/models.py file:

Complete the settings and then visit localhost:80000/admin/you will see the following results.

Querying embedded data fields

In the above example, we want to query all the names that begin with Beatles, and use the following query method:

Refer to Using MongoDB data fields in Django for more information.

Djongo Manager

The Djongo Manager extends the functionality of the Django Manager. It allows you to use all the Pymongo API commands. You can define a custom manager like the Djongo manager in the model.

The use of the manager is the same as the Djongo Manager: Post = Entry.objects.get (Pk=pkey) will get an object with a primary key pkey.

Direct operation to Pymongo

MongoDB has very powerful query commands, and Djongomanager allows you to fully use it.

You can directly use any of the Pymongo commands by prefixing the command name with the MONGO prefix. For example, use aggregate for Blogpage (Blogpage is saved as a data table in SQL and saved as a collection in MongoDB), and the function name becomes mongoaggregate. Insert a file directly in the model (not using. Save ()), using Mongoinsertone ().

Djongo:django and MongoDB connectors