Class: CreateDuctworkBranchLinks

Inherits:
Ductwork::Migration show all
Defined in:
lib/generators/ductwork/update/templates/db/create_ductwork_branch_links.rb,
lib/generators/ductwork/install/templates/db/create_ductwork_branch_links.rb

Instance Method Summary collapse

Methods included from Ductwork::MigrationHelper

#belongs_to, #create_ductwork_table, #mysql?, #postgresql?, #uuid_column_type

Instance Method Details

#change ⇒ Object 



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# File 'lib/generators/ductwork/update/templates/db/create_ductwork_branch_links.rb', line 4

def change
  create_ductwork_table :ductwork_branch_links do |table|
    belongs_to(
      table,
      :parent_branch,
      index: true,
      null: false,
      foreign_key: { to_table: :ductwork_branches }
    )
    belongs_to(
      table,
      :child_branch,
      index: true,
      null: false,
      foreign_key: { to_table: :ductwork_branches }
    )
    table.timestamps null: false
  end

  add_index :ductwork_branch_links,
            %w[parent_branch_id child_branch_id],
            unique: true
end