Class: Groonga::Schema::IndexColumnDefinition
- Inherits:
-
Object
- Object
- Groonga::Schema::IndexColumnDefinition
- Includes:
- Path
- Defined in:
- lib/groonga/schema.rb
Instance Attribute Summary collapse
-
#name ⇒ Object
Returns the value of attribute name.
-
#options ⇒ Object
readonly
Returns the value of attribute options.
-
#target_columns ⇒ Object
Returns the value of attribute target_columns.
-
#target_table ⇒ Object
Returns the value of attribute target_table.
Class Method Summary collapse
Instance Method Summary collapse
- #define(table_definition, table) ⇒ Object
-
#initialize(name, options = {}) ⇒ IndexColumnDefinition
constructor
A new instance of IndexColumnDefinition.
Methods included from Path
#columns_directory_path, #rmdir_if_available, #tables_directory_path
Constructor Details
#initialize(name, options = {}) ⇒ IndexColumnDefinition
Returns a new instance of IndexColumnDefinition.
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# File 'lib/groonga/schema.rb', line 1839 def initialize(name, ={}) @name = name @name = @name.to_s if @name.is_a?(Symbol) @options = ( || {}).dup @target_table = nil @target_columns = nil end |
Instance Attribute Details
#name ⇒ Object
Returns the value of attribute name.
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# File 'lib/groonga/schema.rb', line 1836 def name @name end |
#options ⇒ Object (readonly)
Returns the value of attribute options.
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# File 'lib/groonga/schema.rb', line 1837 def @options end |
#target_columns ⇒ Object
Returns the value of attribute target_columns.
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# File 'lib/groonga/schema.rb', line 1836 def target_columns @target_columns end |
#target_table ⇒ Object
Returns the value of attribute target_table.
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# File 'lib/groonga/schema.rb', line 1836 def target_table @target_table end |
Class Method Details
.column_name(context, target_table, target_columns) ⇒ Object
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# File 'lib/groonga/schema.rb', line 1821 def column_name(context, target_table, target_columns) target_table = resolve(context, target_table) "#{target_table.name}_#{target_columns.join('_')}" end |
.resolve(context, object) ⇒ Object
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# File 'lib/groonga/schema.rb', line 1826 def resolve(context, object) return object if object.is_a?(Groonga::Object) if object.respond_to?(:call) object = object.call(context) end return nil if object.nil? context[object] end |
Instance Method Details
#define(table_definition, table) ⇒ Object
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# File 'lib/groonga/schema.rb', line 1847 def define(table_definition, table) context = table_definition.context target_table = resolve_target_table(context) if target_table.nil? raise UnknownIndexTargetTable.new(@target_table) end nonexistent_columns = nonexistent_columns(target_table) unless nonexistent_columns.empty? raise UnknownIndexTarget.new(target_table, nonexistent_columns) end name = @name || self.class.column_name(context, target_table, @target_columns) index = table.column(name) if index return index if same_index?(context, index, target_table) if @options[:force] index.remove else = @options.merge(:type => :index, :target_table => target_table, :target_columns => @target_columns) raise ColumnCreationWithDifferentOptions.new(index, ) end end index = table.define_index_column(name, target_table, (context, table, name)) index.sources = @target_columns.collect do |column| target_table.column(column) end index end |