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[Bugfix][Selection] yaml selector do not obey default overwrite #10009
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Original file line number | Diff line number | Diff line change |
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# Graph README | ||
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## Graph Selector Creation | ||
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### Selector Loading | ||
During dbt execution, the `@requires.project` decorator creates the final selector objects used in the graph. The `SelectorConfig` class loads selectors from the project configuration, while the `selector_config_from_data` function parses these selectors. | ||
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#### Indirect Selection Default Value | ||
In `@requires.preflight`, dbt reads CLI flags, environment variables, and the parameter's default value. It resolves these inputs based on their precedence order and stores the resolved value in global flags. When loading selectors, the [`selection_criteria_from_dict`](https://github.com/dbt-labs/dbt-core/blob/b316c5f18021fef3d7fd6ec255427054b7d2205e/core/dbt/graph/selector_spec.py#L111) function resolves the indirect selection value to the global flags value if not set. This ensures correct resolution of the indirect selection value. |
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This is the most important change that leads to resolving the bug and also removes all of the variable pass-through.
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What is the motivation for removing the variable pass-through here? I think it could be preferable to call
get_flags().INDIRECT_SELECTION
inrunnable.py
to avoid lower-level methods accessing global state.There was a problem hiding this comment.
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I looked up all call paths using this variable and all of them are referring to
flags. INDIRECT_SELECTION
. We can either pass it all the way everywhere or call it once in this lower level function(since this is where the selector being created.).I think calling once at the lower level is a cleaner implementation overall. Since dbt is built on the assumption of flags is the first thing being constructed during an invocation.
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Okay, that's fair. I recall from our 'de-globalization' conversations in the past that
flags
was more acceptable to access because its never mutated and initialized at the very beginning of an invocation, as you mentioned.