54 lines
1.8 KiB
Ruby
54 lines
1.8 KiB
Ruby
require "active_record/connection_adapters/mysql_adapter"
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require File.join File.dirname(__FILE__), "base"
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module ActiveRecord::Extensions::ConnectionAdapters::MysqlAdapter # :nodoc:
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include ActiveRecord::Extensions::Import::ImportSupport
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include ActiveRecord::Extensions::Import::OnDuplicateKeyUpdateSupport
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# Returns a generated ON DUPLICATE KEY UPDATE statement given the passed
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# in +args+.
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def sql_for_on_duplicate_key_update( table_name, *args ) # :nodoc:
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sql = ' ON DUPLICATE KEY UPDATE '
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arg = args.first
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if arg.is_a?( Array )
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sql << sql_for_on_duplicate_key_update_as_array( table_name, arg )
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elsif arg.is_a?( Hash )
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sql << sql_for_on_duplicate_key_update_as_hash( table_name, arg )
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elsif arg.is_a?( String )
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sql << arg
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else
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raise ArgumentError.new( "Expected Array or Hash" )
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end
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sql
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end
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def sql_for_on_duplicate_key_update_as_array( table_name, arr ) # :nodoc:
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results = arr.map do |column|
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qc = quote_column_name( column )
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"#{table_name}.#{qc}=VALUES(#{qc})"
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end
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results.join( ',' )
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end
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def sql_for_on_duplicate_key_update_as_hash( table_name, hsh ) # :nodoc:
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sql = ' ON DUPLICATE KEY UPDATE '
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results = hsh.map do |column1, column2|
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qc1 = quote_column_name( column1 )
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qc2 = quote_column_name( column2 )
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"#{table_name}.#{qc1}=VALUES( #{qc2} )"
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end
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results.join( ',')
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end
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#return true if the statement is a duplicate key record error
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def duplicate_key_update_error?(exception)# :nodoc:
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exception.is_a?(ActiveRecord::StatementInvalid) && exception.to_s.include?('Duplicate entry')
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end
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end
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ActiveRecord::ConnectionAdapters::MysqlAdapter.class_eval do
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include ActiveRecord::Extensions::ConnectionAdapters::MysqlAdapter
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end
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