python - Length Limit for MySQL Identifiers (table names, column names) using SQLAlchemy with Elixir -

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i using sqlalchemy elixir , works fine using sqlite. however, when switch mysql there table name , column name length limit (64 characters). have quite lot of entities several manytomany relationships , did not find way clamp resulting long table names myfirstentity_rel_otherentities__mysecondentity_rel_thefirstentities in automated way.

foreign key column names manytoone relationships long depending on class , relation name. create_engine("...", label_length = 64) did not trick , use shortcolumns = true avoid having entire python module name prefix well.

the way see go through whole schema , define tablename (for manytomany relationships) , columnname (for manytoone relationships) manually. there other other options?

yes, there more automatic solution: update default elixir options tablename re-definition:

elixir.options_defaults.update(     dict(         tablename = lambda cls: cls.__name__.lower()     ) )

this cause tables referred short names (ie, model name only).


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  1. Unknown2 November 2021 at 08:26

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