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实例公共方法

bigserial(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 57
        

bit(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 61
        

bit_varying(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 65
        

box(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 137
        

cidr(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 69
        

circle(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 149
        

citext(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 73
        

daterange(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 77
        

enum(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 184
included do
  define_column_methods :bigserial, :bit, :bit_varying, :cidr, :citext, :daterange,
    :hstore, :inet, :interval, :int4range, :int8range, :jsonb, :ltree, :macaddr,
    :money, :numrange, :oid, :point, :line, :lseg, :box, :path, :polygon, :circle,
    :serial, :tsrange, :tstzrange, :tsvector, :uuid, :xml, :timestamptz, :enum
end

hstore(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 81
        

inet(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 85
        

int4range(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 93
        

int8range(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 97
        

interval(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 89
        

jsonb(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 101
        

line(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 129
        

lseg(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 133
        

ltree(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 105
        

macaddr(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 109
        

money(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 113
        

numrange(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 117
        

oid(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 121
        

path(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 141
        

point(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 125
        

polygon(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 145
        

primary_key(name, type = :primary_key, **options)

定义主键字段。 支持使用原生 PostgreSQL UUID 类型,可以通过以下方式定义你的表:

create_table :stuffs, id: :uuid do |t|
  t.string :content
  t.timestamps
end

默认情况下,这将使用 pgcrypto 扩展中的 gen_random_uuid() 函数。 由于该扩展仅在 PostgreSQL 9.4+ 中可用,因此对于早期版本,可以显式设置默认值以使用 uuid-ossp 扩展中的 uuid_generate_v4() 代替。

create_table :stuffs, id: false do |t|
  t.primary_key :id, :uuid, default: "uuid_generate_v4()"
  t.uuid :foo_id
  t.timestamps
end

要启用相应的扩展(这是必需的),请在你的迁移中使用 enable_extension 方法。

要使用 UUID 主键而不使用任何扩展,请将 :default 选项设置为 nil

create_table :stuffs, id: false do |t|
  t.primary_key :id, :uuid, default: nil
  t.uuid :foo_id
  t.timestamps
end

你还可以传递返回 UUID 的自定义存储过程,或使用来自其他库的不同 UUID 生成函数。

请注意,将 UUID 主键默认值设置为 nil 将要求你在保存记录之前始终提供 UUID 值(因为主键不能为 nil)。 例如,这可以通过 SecureRandom.uuid 方法和 before_save 回调来完成。

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 48
def primary_key(name, type = :primary_key, **options)
  if type == :uuid
    options[:default] = options.fetch(:default, "gen_random_uuid()")
  end

  super
end

serial(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 153
        

timestamptz(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 177
        

tsrange(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 157
        

tstzrange(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 161
        

tsvector(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 165
        

uuid(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 169
        

xml(*names, **options)

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 173