class Cql::Column(T)

• Cql::Column(T)
• Cql::BaseColumn
• Reference
• Object

Overview

A column in a table This class represents a column in a table It provides methods for setting the column type, default value, and constraints It also provides methods for building expressions

Example Creating a new column

schema.build do
 table :users do
  column :name, String, null: false, default: "John"
  column :age, Int32, null: false
end

Direct Known Subclasses

• Cql::PrimaryKey(T)

Defined in:

Constructors

• .new(name : Symbol, type : T.class, as_name : String | Nil = nil, null : Bool = false, default : DB::Any = nil, unique : Bool = false, size : Int32 | Nil = nil, index : Index | Nil = nil)

Instance Method Summary

• #default : DB::Any
• #expression

  Expressions for this column - @return [Expression::ColumnBuilder] the column expression builder

• #index=(index : Index | Nil)
• #index? : Index | Nil
• #length : Int32 | Nil
• #length=(length : Int32 | Nil)
• #name : Symbol
• #name=(name : Symbol)
• #null? : Bool
• #table : Table | Nil
• #table=(table : Table | Nil)
• #type : Any
• #type=(type : Any)
• #unique? : Bool
• #validate!(value)

  Validate the value - @param value [DB::Any] The value to validate

Constructor Detail

Instance Method Detail

column = Cql::Column.new(:name, String)
column.expression.eq("John")

column = Cql::Column.new(:name, String)
column.validate!("John")