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Code Issues 25 Releases Wiki Activity

Simplified JSONField key transforms by using JSON_OBJECT() on Oracle.

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This commit is contained in:
Mariusz Felisiak 2020-11-20 07:40:06 +01:00
parent bec415b290
commit b996424199
1 changed files with 8 additions and 9 deletions
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17
django/db/models/fields/json.py
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@ -385,11 +385,11 @@ class KeyTransformIn(lookups.In):
):
if connection.vendor == 'oracle':
value = json.loads(param)
sql = "%s(JSON_OBJECT('value' VALUE %%s FORMAT JSON), '$.value')"
if isinstance(value, (list, dict)):
sql = "JSON_QUERY(%s, '$.value')"
sql = sql % 'JSON_QUERY'
else:
sql = "JSON_VALUE(%s, '$.value')"
params = (json.dumps({'value': value}),)
sql = sql % 'JSON_VALUE'
elif connection.vendor in {'sqlite', 'mysql'}:
sql = "JSON_EXTRACT(%s, '$')"
if connection.vendor == 'mysql' and connection.mysql_is_mariadb:
@ -413,15 +413,14 @@ class KeyTransformExact(JSONExact):
rhs, rhs_params = super().process_rhs(compiler, connection)
if connection.vendor == 'oracle':
func = []
sql = "%s(JSON_OBJECT('value' VALUE %%s FORMAT JSON), '$.value')"
for value in rhs_params:
value = json.loads(value)
function = 'JSON_QUERY' if isinstance(value, (list, dict)) else 'JSON_VALUE'
func.append("%s('%s', '$.value')" % (
function,
json.dumps({'value': value}),
))
if isinstance(value, (list, dict)):
func.append(sql % 'JSON_QUERY')
else:
func.append(sql % 'JSON_VALUE')
rhs = rhs % tuple(func)
rhs_params = []
elif connection.vendor == 'sqlite':
func = ["JSON_EXTRACT(%s, '$')" if value != 'null' else '%s' for value in rhs_params]
rhs = rhs % tuple(func)