24 lines
1.2 KiB
SQL
24 lines
1.2 KiB
SQL
-- Registry of flexible field definitions (the "schema of schemas").
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CREATE TABLE field_definition (
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id UUID PRIMARY KEY,
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key TEXT NOT NULL UNIQUE CHECK (key <> ''),
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data_type TEXT NOT NULL CHECK (data_type IN
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('text', 'localized_text', 'integer', 'date', 'boolean', 'term', 'authority')),
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vocabulary_id UUID REFERENCES vocabulary (id) ON DELETE RESTRICT,
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authority_kind TEXT CHECK (authority_kind IN ('person', 'organisation', 'place')),
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required BOOLEAN NOT NULL DEFAULT false,
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group_key TEXT CHECK (group_key <> ''),
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-- A term field must name a vocabulary; any other type must not.
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CONSTRAINT term_has_vocabulary CHECK ((data_type = 'term') = (vocabulary_id IS NOT NULL)),
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-- authority_kind is only meaningful for authority fields.
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CONSTRAINT authority_kind_only_for_authority
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CHECK (authority_kind IS NULL OR data_type = 'authority')
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);
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CREATE TABLE field_definition_label (
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field_definition_id UUID NOT NULL REFERENCES field_definition (id) ON DELETE CASCADE,
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lang TEXT NOT NULL CHECK (lang <> ''),
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label TEXT NOT NULL CHECK (label <> ''),
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PRIMARY KEY (field_definition_id, lang)
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);
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