Reset sequence on an abstract factory #103
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Hmm, looks like a bug. I have lots of issues with the "let's set the sequence counter to the highest available pk" behavior :/ I'll try to fix this soon; in the mean time, setting |
rbarrois
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Nov 16, 2014
Related to issues #78, #92, #103, #111, #153, #170 The default value of all sequences is now 0; the automagic ``_setup_next_sequence`` behavior of Django/SQLAlchemy has been removed. This feature's only goal was to allow the following scenario: 1. Run a Python script that uses MyFactory.create() a couple of times (with a unique field based on the sequence counter) 2. Run the same Python script a second time Without the magical ``_setup_next_sequence``, the Sequence counter would be set to 0 at the beginning of each script run, so both runs would generate objects with the same values for the unique field ; thus conflicting and crashing. The above behavior having only a very limited use and bringing various issues (hitting the database on ``build()``, problems with non-integer or composite primary key columns, ...), it has been removed. It could still be emulated through custom ``_setup_next_sequence`` methods, or by calling ``MyFactory.reset_sequence()``.
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This issue has been fixed in 13d310f, and will be part of the 2.5.0 release. |
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Hi, thanks for maintaining this package, I find it really useful!
I have an issue where I try to share a Sequence between two otherwise unrelated Factories and set the shared Sequence to a specific start value.
My setup of factories is in this gist
The two factories should not inherit from each other, as they have no common attributes apart from the one that should be the Sequence. So I decided to make an abstract Factory with just that Sequence attribute and have both non-abstract Factories inherit from it.
Now, I want the Sequence to start from a particular value, so I'm calling
reset_sequence()on the abstract Factory, but I'm getting the following error:Apparently, the error occurs because Factory Boy is trying to initialize the Sequence to the highest PK, which of course fails for an abstract Factory which has no associated model. But, I want the Sequence to be initialized to the value I pass in reset_sequence() anyway.
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