Deletes one element.
Deletes one element.
element
implicit session
number of deleted elements (0 or 1)
Delete all rows with given a value.
Delete all rows with given a value.
element to query by
Delete all rows with given b value.
Delete all rows with given b value.
element to query by
Checks if element exists in database.
Checks if element exists in database.
element to check for
implicit database session
true if element exists in database
implicit session param for query
all elements of type (A, B)
element to query by
all b values for given a
element to query by
all a values for given b
Saves one element if it's not present in db already.
Saves one element if it's not present in db already.
one element
other element
implicit session
Option(elementId)
Service with basic methods for junction tables.
type of one entity
type of other entity