fix bad-caching of datetime with tz info at sql generation time There is a special handling for datetime with tzinfo, where value was stored in the query cache. The implementation of merge_args was simply overwriting parameters of the query with those in the query cache, expecting no collision. To fix this: * handle replacement of tzinfo in merge_args, not at sql generation time * add an assertion to ensure we've actually no collision Closes #6978316

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Tutorials

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We present a few tutorials of different levels. The blog building

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tutorial introduces one smoothly to the basic concepts.

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Then there is a photo gallery construction tutorial which highlights

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more advanced concepts such as unit tests, security settings,

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migration scripts.

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.. toctree::

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   :maxdepth: 1

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   base/index

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   advanced/index

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   tools/windmill.rst

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   textreports/index

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   dataimport/index