class Marten::DB::Query::SQL::Join

• Marten::DB::Query::SQL::Join
• Reference
• Object

Overview

Represents an SQL join used in the context of a specific query.

SQL joins are managed as a tree, which means that each join can be associated with a list of underlying children joins (for the joins following the considered relationship). SQL joins are "flattened" when the raw SQL queries are generated.

Defined in:

marten/db/query/sql/join.cr

Constructors

• .new(id : Int32, type : JoinType, from_model : Model.class, from_common_field : Field::Base, reverse_relation : ReverseRelation | Nil, to_model : Model.class, to_common_field : Field::Base, selected : Bool, table_alias_prefix : String = "t", children : Array(Marten::DB::Query::SQL::Join) = [] of self)

Instance Method Summary

• #add_child(child : self) : Nil
• #children : Array(Marten::DB::Query::SQL::Join)
• #clone : self
• #column_name(name) : String
• #columns : Array(String)
• #from_common_field : Marten::DB::Field::Base
• #from_model : Marten::DB::Model.class
• #id : Int32
• #parent : Marten::DB::Query::SQL::Join?
• #replace_table_alias_prefix(new_table_alias_prefix : String) : Hash(String, String)
• #reverse_relation : Marten::DB::ReverseRelation?
• #selected? : Bool
• #table_alias : String
• #table_alias_prefix : String
• #to_a : Array(self)
• #to_common_field : Marten::DB::Field::Base
• #to_model : Marten::DB::Model.class
• #to_sql : String
• #type : Marten::DB::Query::SQL::JoinType

Constructor Detail

Instance Method Detail