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module Arel
class Deletion < Compound
def to_sql(formatter = nil)
build_query \
"DELETE",
"FROM #{table_sql}",
("WHERE #{wheres.collect(&:to_sql).join('\n\tAND ')}" unless wheres.blank? ),
("LIMIT #{taken}" unless taken.blank? )
end
end
class Insert < Compound
def to_sql(formatter = nil)
build_query \
"INSERT",
"INTO #{table_sql}",
"(#{record.keys.collect { |key| engine.quote_column_name(key.name) }.join(', ')})",
"VALUES (#{record.collect { |key, value| key.format(value) }.join(', ')})"
end
end
class Update < Compound
def to_sql(formatter = nil)
build_query \
"UPDATE #{table_sql} SET",
assignment_sql,
("WHERE #{wheres.collect(&:to_sql).join('\n\tAND ')}" unless wheres.blank? ),
("LIMIT #{taken}" unless taken.blank? )
end
protected
def assignment_sql
assignments.collect do |attribute, value|
"#{engine.quote_column_name(attribute.name)} = #{attribute.format(value)}"
end.join(",\n")
end
end
end
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