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postgres-json-schema--0.1.1.sql
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postgres-json-schema--0.1.1.sql
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CREATE OR REPLACE FUNCTION _validate_json_schema_type(type text, data jsonb) RETURNS boolean AS $f$
BEGIN
IF type = 'integer' THEN
IF jsonb_typeof(data) != 'number' THEN
RETURN false;
END IF;
IF trunc(data::text::numeric) != data::text::numeric THEN
RETURN false;
END IF;
ELSE
IF type != jsonb_typeof(data) THEN
RETURN false;
END IF;
END IF;
RETURN true;
END;
$f$ LANGUAGE 'plpgsql' IMMUTABLE;
CREATE OR REPLACE FUNCTION validate_json_schema(schema jsonb, data jsonb, root_schema jsonb DEFAULT NULL) RETURNS boolean AS $f$
DECLARE
prop text;
item jsonb;
path text[];
types text[];
pattern text;
props text[];
BEGIN
IF root_schema IS NULL THEN
root_schema = schema;
END IF;
IF schema ? 'type' THEN
IF jsonb_typeof(schema->'type') = 'array' THEN
types = ARRAY(SELECT jsonb_array_elements_text(schema->'type'));
ELSE
types = ARRAY[schema->>'type'];
END IF;
IF (SELECT NOT bool_or(@extschema@._validate_json_schema_type(type, data)) FROM unnest(types) type) THEN
RETURN false;
END IF;
END IF;
IF schema ? 'properties' THEN
FOR prop IN SELECT jsonb_object_keys(schema->'properties') LOOP
IF data ? prop AND NOT @[email protected]_json_schema(schema->'properties'->prop, data->prop, root_schema) THEN
RETURN false;
END IF;
END LOOP;
END IF;
IF schema ? 'required' AND jsonb_typeof(data) = 'object' THEN
IF NOT ARRAY(SELECT jsonb_object_keys(data)) @>
ARRAY(SELECT jsonb_array_elements_text(schema->'required')) THEN
RETURN false;
END IF;
END IF;
IF schema ? 'items' AND jsonb_typeof(data) = 'array' THEN
IF jsonb_typeof(schema->'items') = 'object' THEN
FOR item IN SELECT jsonb_array_elements(data) LOOP
RETURN false;
END IF;
END LOOP;
ELSE
IF NOT (
SELECT bool_and(i > jsonb_array_length(schema->'items') OR @[email protected]_json_schema(schema->'items'->(i::int - 1), elem, root_schema))
FROM jsonb_array_elements(data) WITH ORDINALITY AS t(elem, i)
) THEN
RETURN false;
END IF;
END IF;
END IF;
IF jsonb_typeof(schema->'additionalItems') = 'boolean' and NOT (schema->'additionalItems')::text::boolean AND jsonb_typeof(schema->'items') = 'array' THEN
IF jsonb_array_length(data) > jsonb_array_length(schema->'items') THEN
RETURN false;
END IF;
END IF;
IF jsonb_typeof(schema->'additionalItems') = 'object' THEN
IF NOT (
FROM jsonb_array_elements(data) WITH ORDINALITY AS t(elem, i)
WHERE i > jsonb_array_length(schema->'items')
) THEN
RETURN false;
END IF;
END IF;
IF schema ? 'minimum' AND jsonb_typeof(data) = 'number' THEN
IF data::text::numeric < (schema->>'minimum')::numeric THEN
RETURN false;
END IF;
END IF;
IF schema ? 'maximum' AND jsonb_typeof(data) = 'number' THEN
IF data::text::numeric > (schema->>'maximum')::numeric THEN
RETURN false;
END IF;
END IF;
IF COALESCE((schema->'exclusiveMinimum')::text::bool, FALSE) THEN
IF data::text::numeric = (schema->>'minimum')::numeric THEN
RETURN false;
END IF;
END IF;
IF COALESCE((schema->'exclusiveMaximum')::text::bool, FALSE) THEN
IF data::text::numeric = (schema->>'maximum')::numeric THEN
RETURN false;
END IF;
END IF;
IF schema ? 'anyOf' THEN
IF NOT (SELECT bool_or(@[email protected]_json_schema(sub_schema, data, root_schema)) FROM jsonb_array_elements(schema->'anyOf') sub_schema) THEN
RETURN false;
END IF;
END IF;
IF schema ? 'allOf' THEN
IF NOT (SELECT bool_and(@[email protected]_json_schema(sub_schema, data, root_schema)) FROM jsonb_array_elements(schema->'allOf') sub_schema) THEN
RETURN false;
END IF;
END IF;
IF schema ? 'oneOf' THEN
IF 1 != (SELECT COUNT(*) FROM jsonb_array_elements(schema->'oneOf') sub_schema WHERE @[email protected]_json_schema(sub_schema, data, root_schema)) THEN
RETURN false;
END IF;
END IF;
IF COALESCE((schema->'uniqueItems')::text::boolean, false) THEN
IF (SELECT COUNT(*) FROM jsonb_array_elements(data)) != (SELECT count(DISTINCT val) FROM jsonb_array_elements(data) val) THEN
RETURN false;
END IF;
END IF;
IF schema ? 'additionalProperties' AND jsonb_typeof(data) = 'object' THEN
props := ARRAY(
SELECT key
FROM jsonb_object_keys(data) key
WHERE key NOT IN (SELECT jsonb_object_keys(schema->'properties'))
AND NOT EXISTS (SELECT * FROM jsonb_object_keys(schema->'patternProperties') pat WHERE key ~ pat)
);
IF jsonb_typeof(schema->'additionalProperties') = 'boolean' THEN
IF NOT (schema->'additionalProperties')::text::boolean AND jsonb_typeof(data) = 'object' AND NOT props <@ ARRAY(SELECT jsonb_object_keys(schema->'properties')) THEN
RETURN false;
END IF;
ELSEIF NOT (
SELECT bool_and(@[email protected]_json_schema(schema->'additionalProperties', data->key, root_schema))
FROM unnest(props) key
) THEN
RETURN false;
END IF;
END IF;
IF schema ? '$ref' THEN
path := ARRAY(
SELECT regexp_replace(regexp_replace(path_part, '~1', '/'), '~0', '~')
FROM UNNEST(regexp_split_to_array(schema->>'$ref', '/')) path_part
);
-- ASSERT path[1] = '#', 'only refs anchored at the root are supported';
IF NOT @[email protected]_json_schema(root_schema #> path[2:array_length(path, 1)], data, root_schema) THEN
RETURN false;
END IF;
END IF;
IF schema ? 'enum' THEN
IF NOT EXISTS (SELECT * FROM jsonb_array_elements(schema->'enum') val WHERE val = data) THEN
RETURN false;
END IF;
END IF;
IF schema ? 'minLength' AND jsonb_typeof(data) = 'string' THEN
IF char_length(data #>> '{}') < (schema->>'minLength')::numeric THEN
RETURN false;
END IF;
END IF;
IF schema ? 'maxLength' AND jsonb_typeof(data) = 'string' THEN
IF char_length(data #>> '{}') > (schema->>'maxLength')::numeric THEN
RETURN false;
END IF;
END IF;
IF schema ? 'not' THEN
RETURN false;
END IF;
END IF;
IF schema ? 'maxProperties' AND jsonb_typeof(data) = 'object' THEN
IF (SELECT count(*) FROM jsonb_object_keys(data)) > (schema->>'maxProperties')::numeric THEN
RETURN false;
END IF;
END IF;
IF schema ? 'minProperties' AND jsonb_typeof(data) = 'object' THEN
IF (SELECT count(*) FROM jsonb_object_keys(data)) < (schema->>'minProperties')::numeric THEN
RETURN false;
END IF;
END IF;
IF schema ? 'maxItems' AND jsonb_typeof(data) = 'array' THEN
IF (SELECT count(*) FROM jsonb_array_elements(data)) > (schema->>'maxItems')::numeric THEN
RETURN false;
END IF;
END IF;
IF schema ? 'minItems' AND jsonb_typeof(data) = 'array' THEN
IF (SELECT count(*) FROM jsonb_array_elements(data)) < (schema->>'minItems')::numeric THEN
RETURN false;
END IF;
END IF;
IF schema ? 'dependencies' THEN
FOR prop IN SELECT jsonb_object_keys(schema->'dependencies') LOOP
IF data ? prop THEN
IF jsonb_typeof(schema->'dependencies'->prop) = 'array' THEN
IF NOT (SELECT bool_and(data ? dep) FROM jsonb_array_elements_text(schema->'dependencies'->prop) dep) THEN
RETURN false;
END IF;
ELSE
RETURN false;
END IF;
END IF;
END IF;
END LOOP;
END IF;
IF schema ? 'pattern' AND jsonb_typeof(data) = 'string' THEN
IF (data #>> '{}') !~ (schema->>'pattern') THEN
RETURN false;
END IF;
END IF;
IF schema ? 'patternProperties' AND jsonb_typeof(data) = 'object' THEN
FOR prop IN SELECT jsonb_object_keys(data) LOOP
FOR pattern IN SELECT jsonb_object_keys(schema->'patternProperties') LOOP
IF prop ~ pattern AND NOT @[email protected]_json_schema(schema->'patternProperties'->pattern, data->prop, root_schema) THEN
RETURN false;
END IF;
END LOOP;
END LOOP;
END IF;
IF schema ? 'multipleOf' AND jsonb_typeof(data) = 'number' THEN
IF data::text::numeric % (schema->>'multipleOf')::numeric != 0 THEN
RETURN false;
END IF;
END IF;
RETURN true;
END;
$f$ LANGUAGE 'plpgsql' IMMUTABLE;