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实例公共方法

bigserial(*names, **options)

源代码： GitHub 

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

bit(*names, **options)

源代码： GitHub 

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

bit_varying(*names, **options)

源代码： GitHub 

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

box(*names, **options)

源代码： GitHub 

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

cidr(*names, **options)

来源：GitHub 

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

circle(*names, **options)

来源：GitHub 

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

citext(*names, **options)

来源：GitHub 

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

daterange(*names, **options)

来源：GitHub 

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

enum(*names, **options)

来源：显示 | GitHub 

# 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)

来源：GitHub 

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

inet(*names, **options)

来源：GitHub 

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

int4range(*names, **options)

来源：GitHub 

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

int8range(*names, **options)

来源：GitHub 上 

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

interval(*names, **options)

来源：GitHub 上 

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

jsonb(*names, **options)

来源：GitHub 上 

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

line(*names, **options)

来源：GitHub 上 

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

lseg(*names, **options)

来源：GitHub 上 

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

ltree(*names, **options)

来源：GitHub 上 

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

macaddr(*names, **options)

来源：GitHub 上 

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

money(*names, **options)

来源：GitHub 上 

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

numrange(*names, **options)

来源：GitHub 上 

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

oid(*names, **options)

来源：GitHub 

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

path(*names, **options)

来源：GitHub 

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

point(*names, **options)

来源：GitHub 

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

polygon(*names, **options)

来源：GitHub 

# 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 PostgreSQL 原生 UUID 类型，可以通过如下方式定义表来使用

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，可以设置显式默认值，以使用 uuid-ossp 扩展中的 uuid_generate_v4()

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

要启用适当的扩展（这是必需的），请在迁移中使用 enable_extension 方法。

要在没有任何扩展的情况下使用 UUID 主键，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

您还可以传递一个返回 UUID 的自定义存储过程，或使用另一个库中的不同 UUID 生成函数。

请注意，将 UUID 主键默认值设置为 nil 需要您确保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。

来源：显示 | GitHub 

# 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)

来源：GitHub 上 

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

timestamptz(*names, **options)

来源：GitHub 上 

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

tsrange(*names, **options)

来源：GitHub 上 

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

tstzrange(*names, **options)

来源：GitHub 上 

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

tsvector(*names, **options)

来源：GitHub 上 

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

uuid(*names, **options)

来源：GitHub 上 

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

xml(*names, **options)

来源：GitHub 上 

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