我想添加与以下内容相同的迁移:
ALTER TABLE my_table ADD COLUMN int_array integer[];
结果列: int_array,类型:整数[],存储:extendent
我尝试了这些选项,但它没有用。
def change
add_column :my_table, :int_array, :integer, array: true, default: [] #first option
add_column :my_table, :int_array, :integer, array: true, default: '{}' #second options
end
发生错误:
== AddIntArrayToMyTable: migrating ==========================================
-- add_column(:my_table, :int_array, :integer, {:array=>true, :default=>[]})
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:
PG::InvalidTextRepresentation: ERROR: incorrect syntax for input integer: "--- []
"
: ALTER TABLE "my_table" ADD COLUMN "int_array" integer DEFAULT '--- []
和
== AddIntArrayToMyTable: migrating ==========================================
-- add_column(:my_table, :int_array, :integer, {:array=>true, :default=>"{}"})
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:
PG::InvalidTextRepresentation: ERROR: incorrect syntax for input integer: "{}"
任何想法都可能出错? 我使用rails Rails 3.2.16和postgreSQL 9.4
感谢advence。
答案 0 :(得分:0)
我找到了执行方法的解决方案。
def up
execute "ALTER TABLE my_table ADD COLUMN int_array integer[];"
end
def down
execute "ALTER TABLE my_table DROP COLUMN int_array;"
end