apoc.util.validate
Procedure APOC Core
apoc.util.validate(predicate, message, params) | if the predicate yields to true raise an exception
Signature
apoc.util.validate(predicate :: BOOLEAN?, message :: STRING?, params :: LIST? OF ANY?) :: VOID
Input parameters
Name | Type | Default |
---|---|---|
predicate |
BOOLEAN? |
null |
message |
STRING? |
null |
params |
LIST? OF ANY? |
null |
Usage Examples
The following throws an exception because the predicate is true:
WITH true AS predicate
CALL apoc.util.validate(predicate,'message %d',[42])
RETURN count(*);
Failed to invoke procedure |
The following does nothing because the predicate is false:
WITH false AS predicate
CALL apoc.util.validate(predicate,'message %d',[42])
RETURN count(*);
count(*) |
---|
1 |