Generating Migrations file from Models definitions and changes

Today you need to specify all the columns from a table in the migrations file and then write them all again in the respective model file. Basically you have to repeat yourself.
Since there isn't yet an official documentation from SearchLight, I was wondering if there is a way to detect the changes from the model definition and generating the migrations file from it, instead of having to repeat yourself two times (also, making the process less prompt to human errors).
This feature will be similar to what Alembic does to generate migrations for SQLAlchemy in python, it sees the changes in a model and generates a migration file only with the changes made to the model.

Start by tracing how SearchLight currently represents model definitions and migrations, then identify where schema changes could be compared. Done would mean generating a migration containing only changes detected from the model definition, with behavior comparable to the Alembic example described in the issue.

Written by the indexing model from the issue text.