Class: ActiveRecord::TableMetadata
- Defined in:
- activerecord/lib/active_record/table_metadata.rb
Overview
:nodoc:
Instance Method Summary collapse
- #aggregated_with?(aggregation_name) ⇒ Boolean
- #arel_attribute(column_name) ⇒ Object
- #associated_table(table_name) ⇒ Object
- #associated_with?(association_name) ⇒ Boolean
- #has_column?(column_name) ⇒ Boolean
-
#initialize(klass, arel_table, association = nil, types = klass) ⇒ TableMetadata
constructor
A new instance of TableMetadata.
- #polymorphic_association? ⇒ Boolean
- #reflect_on_aggregation(aggregation_name) ⇒ Object
- #resolve_column_aliases(hash) ⇒ Object
- #type(column_name) ⇒ Object
Constructor Details
#initialize(klass, arel_table, association = nil, types = klass) ⇒ TableMetadata
Returns a new instance of TableMetadata.
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# File 'activerecord/lib/active_record/table_metadata.rb', line 7 def initialize(klass, arel_table, association = nil, types = klass) @klass = klass @types = types @arel_table = arel_table @association = association end |
Instance Method Details
#aggregated_with?(aggregation_name) ⇒ Boolean
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# File 'activerecord/lib/active_record/table_metadata.rb', line 64 def aggregated_with?(aggregation_name) klass && reflect_on_aggregation(aggregation_name) end |
#arel_attribute(column_name) ⇒ Object
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# File 'activerecord/lib/active_record/table_metadata.rb', line 24 def arel_attribute(column_name) if klass klass.arel_attribute(column_name, arel_table) else arel_table[column_name] end end |
#associated_table(table_name) ⇒ Object
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# File 'activerecord/lib/active_record/table_metadata.rb', line 44 def associated_table(table_name) association = klass._reflect_on_association(table_name) || klass._reflect_on_association(table_name.to_s.singularize) if !association && table_name == arel_table.name self elsif association && !association.polymorphic? association_klass = association.klass arel_table = association_klass.arel_table.alias(table_name) TableMetadata.new(association_klass, arel_table, association) else type_caster = TypeCaster::Connection.new(klass, table_name) arel_table = Arel::Table.new(table_name, type_caster: type_caster) TableMetadata.new(nil, arel_table, association, type_caster) end end |
#associated_with?(association_name) ⇒ Boolean
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# File 'activerecord/lib/active_record/table_metadata.rb', line 40 def associated_with?(association_name) klass && klass._reflect_on_association(association_name) end |
#has_column?(column_name) ⇒ Boolean
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# File 'activerecord/lib/active_record/table_metadata.rb', line 36 def has_column?(column_name) klass && klass.columns_hash.key?(column_name.to_s) end |
#polymorphic_association? ⇒ Boolean
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# File 'activerecord/lib/active_record/table_metadata.rb', line 60 def polymorphic_association? association && association.polymorphic? end |
#reflect_on_aggregation(aggregation_name) ⇒ Object
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# File 'activerecord/lib/active_record/table_metadata.rb', line 68 def reflect_on_aggregation(aggregation_name) klass.reflect_on_aggregation(aggregation_name) end |
#resolve_column_aliases(hash) ⇒ Object
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# File 'activerecord/lib/active_record/table_metadata.rb', line 14 def resolve_column_aliases(hash) new_hash = hash.dup hash.each_key do |key| if key.is_a?(Symbol) && new_key = klass.attribute_aliases[key.to_s] new_hash[new_key] = new_hash.delete(key) end end new_hash end |
#type(column_name) ⇒ Object
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# File 'activerecord/lib/active_record/table_metadata.rb', line 32 def type(column_name) types.type_for_attribute(column_name) end |