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

     1  package builder
     2  
     3  import (
     4  	"errors"
     5  	"fmt"
     6  )
     7  
     8  func (b *Builder) updateWriteTo(w Writer) error {
     9  	if len(b.tableName) <= 0 {
    10  		return errors.New("no table indicated")
    11  	}
    12  	if len(b.updates) <= 0 {
    13  		return errors.New("no column to be update")
    14  	}
    15  
    16  	if _, err := fmt.Fprintf(w, "UPDATE %s SET ", b.tableName); err != nil {
    17  		return err
    18  	}
    19  
    20  	for i, s := range b.updates {
    21  		if err := s.opWriteTo(",", w); err != nil {
    22  			return err
    23  		}
    24  
    25  		if i != len(b.updates)-1 {
    26  			if _, err := fmt.Fprint(w, ","); err != nil {
    27  				return err
    28  			}
    29  		}
    30  	}
    31  
    32  	if _, err := fmt.Fprint(w, " WHERE "); err != nil {
    33  		return err
    34  	}
    35  
    36  	return b.cond.WriteTo(w)
    37  }