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Created November 29, 2012 08:45
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Doctrine: SingleTable Inheritance, ClassMetaData, APC problem
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gistfile1.txt
I'll try to explain:
We have ProductTaxonomyTerm and CategoryTaxonomyTerm, which both extend BaseTaxonomyTerm.
BaseTaxonomyTerm is configured with SingleTableInheritance with a discriminator column type.
Local env works without issues, but on our staging it sometimes happens, that the ClassMetaData is 'corrupt'.
The Base/Category (in this example) metadata looks fine (when I look at the value stored in APC), but the ProductTaxonomyTerm has no parentClasses defined anymore (in ClassMetadata).
Apache graceful (APC clear) solves the issue, but only half. The problem re-arises on another website (we have a mutli-site solution), which site it is, seems pure random.
The missing parentClasses causes, that Doctrine generates a faulty SQL query (empty WHERE IN()).
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