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44 lines
1.0 KiB
Go
44 lines
1.0 KiB
Go
package rule
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import (
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"fmt"
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"gorm.io/gorm"
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)
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// NotExists 验证一个值在某个表中的字段中不存在，支持同时判断多个字段
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// NotExists verify a value does not exist in a table field, support judging multiple fields at the same time
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// 用法：notExists:表名称,字段名称,字段名称,字段名称
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// Usage: notExists:table_name,field_name,field_name,field_name
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// 例子：notExists:users,phone,email
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// Example: notExists:users,phone,email
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type NotExists struct {
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db *gorm.DB
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}
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func NewNotExists(db *gorm.DB) *NotExists {
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return &NotExists{db: db}
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}
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func (r *NotExists) Passes(val any, options ...any) bool {
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if len(options) < 2 {
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return false
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}
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tableName := options[0].(string)
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fieldNames := options[1:]
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query := r.db.Table(tableName).Where(fmt.Sprintf("%s = ?", fieldNames[0]), val)
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for _, fieldName := range fieldNames[1:] {
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query = query.Or(fmt.Sprintf("%s = ?", fieldName), val)
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}
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var count int64
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err := query.Count(&count).Error
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if err != nil {
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return false
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}
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return count == 0
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}
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