Is there any shorter/prettier way for this?


It's not hard to add a custom method to the base query class that returns


but it feels like something that should be part of SQLAlchemy.

Also, is there any case where `.enable_eagerloads(False)` right before 
`.exists()` could cause problems / different results?
If not, wouldn't it make sense for exists() to do that automatically? 
Loading a relationship doesn't ever seem to make sense
when checking exists().

SQLAlchemy - 
The Python SQL Toolkit and Object Relational Mapper

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