Django db_index=true

When we should use db_index=True in Django?

This is not really django specific; more to do with databases. You add indexes on columns when you want to speed up searches on that column.

Typically, only the primary key is indexed by the database. This means look ups using the primary key are optimized.

If you do a lot of lookups on a secondary column, consider adding an index to that column to speed things up
I would say you should use db_index=True when you have a field that is unique for more useful lookups.

For example if you a table customers with records of many users they'll each have their own unique user_id. 
Each user_id would be unique and having to index this field to find that unique user is more often desirable than say their first_name or last_name.
Actually this is also ok but since they're not unique you will get probably recieve multiple results from your queries and this might not be as useful as using an referencing their id.

Similar codes

0 vote196 views1 answer
Django-multivaluedictkeyerror-error
Python Django
23 votes371 views3 answers
Django drf
Python Django
24 votes396 views6 answers
Django update model
Python Django
5 votes209 views2 answers
Django form password field
Python Django
0 vote211 views1 answer
DJANGO model instance get by variable
Python Django
15 votes258 views4 answers
Django python install
Python Django
7 votes243 views2 answers
Ckeditor django
Python Django
0 vote229 views2 answers
Blog in django
Python Django
0 vote213 views1 answer
Bootstrap 5 in Django
Python Django
0 vote196 views1 answer
Where to import messages in django
Python Django