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relationalai.std.strings.like()

like(string: Producer, pattern: str|Producer) -> Expression

Filters values produced by a Producer to only include strings that match a specified SQL LIKE pattern. The % character acts as a wildcard, matching any sequence of characters. Must be called in a rule or query context.

Parameters

Name	Type	Description
`string`	`Producer`	The string to match against.
`pattern`	`str` or `Producer`	The SQL LIKE pattern to match.

Returns

An Expression object.

Example

Use like() to filter strings that match a specified SQL LIKE pattern:

import relationalai as rai
from relationalai.std import strings


# =====
# SETUP
# =====

model = rai.Model("MyModel")
Person = model.Type("Person")

with model.rule():
    Person.add(id=1).set(name="Alice")
    Person.add(id=2).set(name="Bob")


# ========
# EXAMPLES
# ========

# Get all people whose name contains 'li'.
with model.query() as select:
    person = Person()
    strings.like(person.name, "%li%")
    response = select(person.id, person.name)

print(response.results)
#    id   name
# 0   1  Alice


# Get all people whose name does not contain 'li'.
with model.query() as select:
    person = Person()
    with model.not_found():
        strings.like(person.name, "%li%")
    response = select(person.id, person.name)

print(response.results)
#    id name
# 0   2  Bob

See Also