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value.go
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/
value.go
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package ged
import (
"fmt"
"reflect"
"strings"
)
type Value struct {
value any
expr bool
skip bool
nonZero bool
operator string // 运算符
}
// IsSkip 返回值是否被跳过
func (v Value) IsSkip() bool {
return v.skip ||
v.nonZero && reflect.ValueOf(v.value).IsZero()
}
func (v Value) String() string {
return fmt.Sprint(value(&v))
}
func operator(v any) (operator string) {
if val, ok := v.(*Value); ok {
operator = val.operator
}
if operator == "" {
return "="
}
return
}
func value(v any) any {
if val, ok := v.(*Value); ok {
if x, ok := val.value.([]*Value); ok {
return fmt.Sprintf("%s AND %s", x[0], x[1])
}
if s, ok := val.value.(string); ok && !val.expr {
return fmt.Sprintf("'%s'", s)
}
return val.value
}
if _, ok := v.(string); ok {
return fmt.Sprintf("'%s'", v)
}
t := reflect.ValueOf(v)
if t.Kind() == reflect.Slice || t.Kind() == reflect.Array {
length, sql := t.Len(), ""
for i := 0; i < length; i++ {
x := t.Index(i).Interface() // 列表元素
if v, ok := x.(*Value); ok && v.IsSkip() {
continue
}
sql += fmt.Sprintf("%v, ", value(x))
}
return fmt.Sprintf("IN (%s)", strings.TrimRight(sql, ", "))
}
return v
}