Class Sequel::Postgres::PGRow::HashRow
In: lib/sequel/extensions/pg_row.rb
Parent: DelegateClass(Hash)

Class for row-valued/composite types that are treated as hashes. Types registered via Database#register_row_type will use this class by default.

Methods

check_columns!   columns   db_type   sql_literal_append   subclass  

Included Modules

Sequel::SQL::AliasMethods

External Aliases

new -> call
  Alias new to call, so that the class itself can be used directly as a converter.
__getobj__ -> to_hash
  Return the underlying hash for this delegate object.

Attributes

columns  [RW]  The columns associated with this class.
columns  [W]  Sets the columns associated with this instance. This is used to override the class‘s default columns.
db_type  [RW]  The database type for this class. May be nil if this class done not have a specific database type.
db_type  [W]  Sets the database type associated with this instance. This is used to override the class‘s default database type.

Public Class methods

subclass(db_type, columns)

Create a new subclass of this class with the given database type and columns.

[Source]

     # File lib/sequel/extensions/pg_row.rb, line 160
160:         def self.subclass(db_type, columns)
161:           Class.new(self) do
162:             @db_type = db_type
163:             @columns = columns
164:           end
165:         end

Public Instance methods

check_columns!()

Check that the HashRow has valid columns. This should be used before all attempts to literalize the object, since literalization depends on the columns to get the column order.

[Source]

     # File lib/sequel/extensions/pg_row.rb, line 193
193:         def check_columns!
194:           if columns.nil? || columns.empty?
195:             raise Error, 'cannot literalize HashRow without columns'
196:           end
197:         end
columns()

Return the instance‘s columns, or the class‘s columns if the instance has not overridden it.

[Source]

     # File lib/sequel/extensions/pg_row.rb, line 180
180:         def columns
181:           @columns || self.class.columns
182:         end
db_type()

Return the instance‘s database type, or the class‘s columns if the instance has not overridden it.

[Source]

     # File lib/sequel/extensions/pg_row.rb, line 186
186:         def db_type
187:           @db_type || self.class.db_type
188:         end
sql_literal_append(ds, sql)

Append SQL fragment related to this object to the sql.

[Source]

     # File lib/sequel/extensions/pg_row.rb, line 200
200:         def sql_literal_append(ds, sql)
201:           check_columns!
202:           sql << ROW
203:           ds.literal_append(sql, values_at(*columns))
204:           if db_type
205:             sql << CAST
206:             ds.quote_schema_table_append(sql, db_type)
207:           end
208:         end

[Validate]