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Logesh Jayaraman
445 PointsDifference
What is the difference between Makemigrations and migrations. i saw the notes as
"python manage.py makemigrations [app] will make the migrations for a specific app.
python manage.py migrate [app] will run the pending migrations for a specific app. If you leave off the app name, any pending migrations for any apps will be run."
Is it mandatory to run both the commands.
And what is syncdb?
1 Answer
Chris Freeman
Treehouse Moderator 68,457 PointsIt is necessary to run both the commands to complete the migration of the database tables to be in sync with your models.
makemigrations simply analyzes your current models for any changes that would be out of sync with your database and creates a migrations file that can be used to bring the in sync. If left at this point, your models would still be out of sync with your database possibly breaking your code that queries the database.
migrate is the command to "Make It So!" and apply the changes noted during the makemigrations phase.
Applying [app] to either of these commands simply adds focus to that "app" and doesn't inspect all of your apps.
syncdb is used for newly created models that do not yet have a corresponding table in the database. This is why syncdb is run first when you have a new models.py file.