contains()#
relationalai.std.strings
#contains(string: str | Producer, substring: str | Producer) -> Expression
Checks if a string contains a substring. Must be called in a rule or query context.
Parameters#
Name | Type | Description |
---|---|---|
string | Producer | The string to check. |
substring | str or Producer | The substring to check for. |
Returns#
An Expression
object.
Example#
#import relationalai as rai
from relationalai.std.strings import contains
# Create a model named "people" with a Person type.
model = rai.Model("people")
Person = model.Type("Person")
# Add some people to the model.
with model.rule():
alice = Person.add(name="Alice")
bob = Person.add(name="Bob")
# Get all people whose name contains "Ali".
with model.query() as select:
person = Person()
contains(person.name, "Ali")
response = select(person.name)
print(response.results)
# Output:
# name
# 0 Alice
# The `substring` argument can also be a Producer.
with model.query() as select:
sub = Person(name="Bob").name
person = Person()
contains(person.name, sub)
response = select(person.name)
print(response.results)
# Output:
# name
# 0 Bob