metabase.sync.analyze.classifiers.category
Classifier that determines whether a Field should be marked as a :type/Category and/or as a list Field based on
the number of distinct values it has.
As of Metabase v0.29, the Category now longer has any use inside of the Metabase backend; it is used
only for frontend purposes (e.g. deciding which widget to show). Previously, makring something as a Category meant
that its values should be cached and saved in a FieldValues object. With the changes in v0.29, this is instead
managed by a column called has_field_values.
A value of list now means the values should be cached. Deciding whether a Field should be a list Field is still
determined by the cardinality of the Field, like Category status. Thus it is entirely possibly for a Field to be
both a Category and a list Field.
Classifier that determines whether a Field should be marked as a `:type/Category` and/or as a `list` Field based on the number of distinct values it has. As of Metabase v0.29, the Category now longer has any use inside of the Metabase backend; it is used only for frontend purposes (e.g. deciding which widget to show). Previously, makring something as a Category meant that its values should be cached and saved in a FieldValues object. With the changes in v0.29, this is instead managed by a column called `has_field_values`. A value of `list` now means the values should be cached. Deciding whether a Field should be a `list` Field is still determined by the cardinality of the Field, like Category status. Thus it is entirely possibly for a Field to be both a Category and a `list` Field.
infer-is-category-or-listclj
(infer-is-category-or-list field fingerprint)Inputs: [field :- i/FieldInstance fingerprint :- (s/maybe i/Fingerprint)] Returns: (s/maybe i/FieldInstance)
Classifier that attempts to determine whether FIELD ought to be marked as a Category based on its distinct count.
Inputs: [field :- i/FieldInstance fingerprint :- (s/maybe i/Fingerprint)] Returns: (s/maybe i/FieldInstance) Classifier that attempts to determine whether FIELD ought to be marked as a Category based on its distinct count.
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