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Contents
module ActiveRecord::Import::MysqlAdapter
module InstanceMethods
def self.included(klass)
klass.instance_eval do
include ActiveRecord::Import::ImportSupport
include ActiveRecord::Import::OnDuplicateKeyUpdateSupport
end
end
# Returns a generated ON DUPLICATE KEY UPDATE statement given the passed
# in +args+.
def sql_for_on_duplicate_key_update( table_name, *args ) # :nodoc:
sql = ' ON DUPLICATE KEY UPDATE '
arg = args.first
if arg.is_a?( Array )
sql << sql_for_on_duplicate_key_update_as_array( table_name, arg )
elsif arg.is_a?( Hash )
sql << sql_for_on_duplicate_key_update_as_hash( table_name, arg )
elsif arg.is_a?( String )
sql << arg
else
raise ArgumentError.new( "Expected Array or Hash" )
end
sql
end
def sql_for_on_duplicate_key_update_as_array( table_name, arr ) # :nodoc:
results = arr.map do |column|
qc = quote_column_name( column )
"#{table_name}.#{qc}=VALUES(#{qc})"
end
results.join( ',' )
end
def sql_for_on_duplicate_key_update_as_hash( table_name, hsh ) # :nodoc:
sql = ' ON DUPLICATE KEY UPDATE '
results = hsh.map do |column1, column2|
qc1 = quote_column_name( column1 )
qc2 = quote_column_name( column2 )
"#{table_name}.#{qc1}=VALUES( #{qc2} )"
end
results.join( ',')
end
#return true if the statement is a duplicate key record error
def duplicate_key_update_error?(exception)# :nodoc:
exception.is_a?(ActiveRecord::StatementInvalid) && exception.to_s.include?('Duplicate entry')
end
end
end
Version data entries
7 entries across 7 versions & 2 rubygems