CondCodeEq function returns a condition function that matches a particular constraint code.

CondConstraintEq function returns a condition function that matches a particular constraint name.

CondPQ function returns a condition function that matches standard lib/pq error.

NewForeignKeyMapping function returns a mapping function that performs mapping of a constraint name (c) to specific foreign key message with user-friendly referencing (t1) and referenced (t2) table names provided.

NewNotNullMapping function returns a mapping function that performs mapping of a constraint name (c) to specific not-null violation error message with user-friendly table (t) name and column (col) name provided.

NewRestrictMapping function returns a mapping function that performs mapping of a constraint name (c) to specific restrict violation error message with user-friendly referencing (t1) and referenced (t2) table names provided.

NewUniqueMapping function returns a mapping function that performs mapping of a constraint name (c) to a specific unique violation error message with user-friendly table name (t) and column (col) name provided.

ToMapFunc function converts mapping function for *pq.Error to a conventional MapFunc from atlas-app-toolkit/errors package.