29 lines
1.3 KiB
SQL
29 lines
1.3 KiB
SQL
-- Building verification
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-- Users can verify the correctness of individual building attribute values.
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-- For a building, it's most useful to know the count of verifications of each
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-- attribute with current (or past) values.
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-- For a user, it's useful to show which attributes they have already verified
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-- on a given building.
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-- Store user-building-attribute verification
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CREATE TABLE IF NOT EXISTS building_verification (
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verification_id serial PRIMARY KEY,
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verification_timestamp TIMESTAMP default NOW(),
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building_id integer REFERENCES buildings,
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user_id uuid REFERENCES users,
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attribute varchar, -- bit of a hack to refer to any `buildings` table column name
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verified_value jsonb -- bit of a hack to include "any" value
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);
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CREATE INDEX building_verification_idx ON building_verification ( building_id );
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CREATE INDEX user_verification_idx ON building_verification ( user_id );
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CREATE INDEX building_user_verification_idx ON building_verification ( building_id, user_id );
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-- Enforce that a user only has one opinion about the correct value of an
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-- attribute for a given building (don't need to allow multiple verified_values)
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ALTER TABLE building_verification ADD CONSTRAINT verify_building_attribute_once
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UNIQUE ( building_id, user_id, attribute );
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