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

     1  package builder
     2  
     3  import "fmt"
     4  
     5  type condOr []Cond
     6  
     7  var _ Cond = condOr{}
     8  
     9  func Or(conds ...Cond) Cond {
    10  	var result = make(condOr, 0, len(conds))
    11  	for _, cond := range conds {
    12  		if cond == nil || !cond.IsValid() {
    13  			continue
    14  		}
    15  		result = append(result, cond)
    16  	}
    17  	return result
    18  }
    19  
    20  func (or condOr) WriteTo(w Writer) error {
    21  	for i, cond := range or {
    22  		var needQuote bool
    23  		switch cond.(type) {
    24  		case condAnd:
    25  			needQuote = true
    26  		case Eq:
    27  			needQuote = (len(cond.(Eq)) > 1)
    28  		}
    29  
    30  		if needQuote {
    31  			fmt.Fprint(w, "(")
    32  		}
    33  
    34  		err := cond.WriteTo(w)
    35  		if err != nil {
    36  			return err
    37  		}
    38  
    39  		if needQuote {
    40  			fmt.Fprint(w, ")")
    41  		}
    42  
    43  		if i != len(or)-1 {
    44  			fmt.Fprint(w, " OR ")
    45  		}
    46  	}
    47  
    48  	return nil
    49  }
    50  
    51  func (o condOr) And(conds ...Cond) Cond {
    52  	return And(o, And(conds...))
    53  }
    54  
    55  func (o condOr) Or(conds ...Cond) Cond {
    56  	return Or(o, Or(conds...))
    57  }
    58  
    59  func (o condOr) IsValid() bool {
    60  	return len(o) > 0
    61  }