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    类 TableColumn

    Table's columns in the database represented in this class.

    索引

    构造函数

    constructor

    属性

    @instanceof asExpression? charset? collation? comment? default? enum? enumName? generatedIdentity? generatedType? generationStrategy? isArray isGenerated isNullable isPrimary isUnique length name onUpdate? precision? primaryKeyConstraintName? scale? spatialFeatureType? srid? type unsigned width? zerofill

    方法

    clone

    构造函数

    • 参数

      返回 TableColumn

    属性

    "@instanceof": symbol
    asExpression?: string

    Generated column expression.

    charset?: string

    Defines column character set.

    collation?: string

    Defines column collation.

    comment?: string

    Column's comment.

    default?: any

    Column's default value.

    enum?: string[]

    Array of possible enumerated values.

    enumName?: string

    Exact name of enum

    generatedIdentity?: "ALWAYS" | "BY DEFAULT"

    Identity column type. Supports only in Postgres 10+.

    generatedType?: "VIRTUAL" | "STORED"

    Generated column type.

    generationStrategy?: "uuid" | "rowid" | "increment" | "identity"

    Specifies generation strategy if this column will use auto increment. rowid option supported only in CockroachDB.

    isArray: boolean

    Indicates if column stores array.

    isGenerated: boolean

    Indicates if column is auto-generated sequence.

    isNullable: boolean

    Indicates if column is NULL, or is NOT NULL in the database.

    isPrimary: boolean

    Indicates if column is a primary key.

    isUnique: boolean

    Indicates if column has unique value.

    length: string

    Column type's length. Used only on some column types. For example type = "string" and length = "100" means that ORM will create a column with type varchar(100).

    name: string

    Column name.

    onUpdate?: string

    ON UPDATE trigger. Works only for MySQL.

    precision?: null | number

    The precision for a decimal (exact numeric) column (applies only for decimal column), which is the maximum number of digits that are stored for the values.

    primaryKeyConstraintName?: string

    Name of the primary key constraint for primary column.

    scale?: number

    The scale for a decimal (exact numeric) column (applies only for decimal column), which represents the number of digits to the right of the decimal point and must not be greater than precision.

    spatialFeatureType?: string

    Spatial Feature Type (Geometry, Point, Polygon, etc.)

    srid?: number

    SRID (Spatial Reference ID (EPSG code))

    type: string

    Column type.

    unsigned: boolean

    Puts UNSIGNED attribute on to numeric column. Works only for MySQL.

    width?: number

    Column type's display width. Used only on some column types in MySQL. For example, INT(4) specifies an INT with a display width of four digits.

    zerofill: boolean

    Puts ZEROFILL attribute on to numeric column. Works only for MySQL. If you specify ZEROFILL for a numeric column, MySQL automatically adds the UNSIGNED attribute to the column

    方法

    • Clones this column to a new column with exact same properties as this column has.

      返回 TableColumn

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