github.com/insionng/yougam@v0.0.0-20170714101924-2bc18d833463/libraries/go-xorm/builder/cond_null.go (about)

     1  package builder
     2  
     3  import "fmt"
     4  
     5  // IsNull
     6  type IsNull [1]string
     7  
     8  var _ Cond = IsNull{""}
     9  
    10  func (isNull IsNull) WriteTo(w Writer) error {
    11  	_, err := fmt.Fprintf(w, "%s IS NULL", isNull[0])
    12  	return err
    13  }
    14  
    15  func (isNull IsNull) And(conds ...Cond) Cond {
    16  	return And(isNull, And(conds...))
    17  }
    18  
    19  func (isNull IsNull) Or(conds ...Cond) Cond {
    20  	return Or(isNull, Or(conds...))
    21  }
    22  
    23  func (isNull IsNull) IsValid() bool {
    24  	return len(isNull[0]) > 0
    25  }
    26  
    27  // NotNull
    28  type NotNull [1]string
    29  
    30  var _ Cond = NotNull{""}
    31  
    32  func (notNull NotNull) WriteTo(w Writer) error {
    33  	_, err := fmt.Fprintf(w, "%s IS NOT NULL", notNull[0])
    34  	return err
    35  }
    36  
    37  func (notNull NotNull) And(conds ...Cond) Cond {
    38  	return And(notNull, And(conds...))
    39  }
    40  
    41  func (notNull NotNull) Or(conds ...Cond) Cond {
    42  	return Or(notNull, Or(conds...))
    43  }
    44  
    45  func (notNull NotNull) IsValid() bool {
    46  	return len(notNull[0]) > 0
    47  }