aice/models/aice_users.go

package models

import (
	"errors"
	"fmt"
	"reflect"
	"strings"

	"github.com/beego/beego/v2/client/orm"
)

type AiceUsers struct {
	Userid   string `orm:"column(userid);pk"`
	Email    string `orm:"column(email);size(255);null"`
	Token    string `orm:"column(token);size(255);null"`
	Username string `orm:"column(username);size(255);null"`
	Address  string `orm:"column(address);size(255);null"`
	Password string `orm:"column(password);size(255);null"`
}

func (t *AiceUsers) TableName() string {
	return "aice_users"
}

func init() {
	orm.RegisterModel(new(AiceUsers))
}

// AddAiceUsers insert a new AiceUsers into database and returns
// last inserted Id on success.
func AddAiceUsers(m *AiceUsers) (id int64, err error) {
	o := orm.NewOrm()
	id, err = o.Insert(m)
	return
}

// GetAiceUsersById retrieves AiceUsers by Id. Returns error if
// Id doesn't exist
func GetAiceUsersById(id string) (v *AiceUsers, err error) {
	o := orm.NewOrm()
	v = &AiceUsers{Userid: id}
	if err = o.Read(v); err == nil {
		return v, nil
	}
	return nil, err
}

// GetAllAiceUsers retrieves all AiceUsers matches certain condition. Returns empty list if
// no records exist
func GetAllAiceUsers(query map[string]string, fields []string, sortby []string, order []string,
	offset int64, limit int64) (ml []interface{}, err error) {
	o := orm.NewOrm()
	qs := o.QueryTable(new(AiceUsers))
	// query k=v
	for k, v := range query {
		// 验证字段名有效性，防止SQL注入
		if !isValidFieldName(k) {
			return nil, fmt.Errorf("invalid field name: %s", k)
		}
		// rewrite dot-notation to Object__Attribute
		k = strings.Replace(k, ".", "__", -1)
		if strings.Contains(k, "isnull") {
			qs = qs.Filter(k, (v == "true" || v == "1"))
		} else {
			qs = qs.Filter(k, v)
		}
	}
	// order by:
	var sortFields []string
	if len(sortby) != 0 {
		// 验证order参数的有效性
		if len(order) != 0 && len(order) != 1 && len(order) != len(sortby) {
			return nil, errors.New("Error: 'sortby', 'order' sizes mismatch or 'order' size is not 1")
		}

		// 统一处理排序逻辑，消除重复代码
		for i, field := range sortby {
			orderDir := "asc"
			if len(order) == 1 {
				orderDir = order[0]
			} else if len(order) > 1 {
				orderDir = order[i]
			}

			orderby := ""
			if orderDir == "desc" {
				orderby = "-" + field
			} else if orderDir == "asc" {
				orderby = field
			} else {
				return nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
			}
			sortFields = append(sortFields, orderby)
		}
		qs = qs.OrderBy(sortFields...)
	} else {
		if len(order) != 0 {
			return nil, errors.New("Error: unused 'order' fields")
		}
	}

	var l []AiceUsers

	// 验证分页参数
	if limit <= 0 || limit > 1000 {
		return nil, errors.New("Error: limit must be between 1 and 1000")
	}
	if offset < 0 {
		return nil, errors.New("Error: offset must be non-negative")
	}

	if _, err = qs.Limit(limit, offset).All(&l, fields...); err == nil {
		if len(fields) == 0 {
			for _, v := range l {
				ml = append(ml, v)
			}
		} else {
			// trim unused fields
			for _, v := range l {
				m := make(map[string]interface{})
				val := reflect.ValueOf(v)
				for _, fname := range fields {
					field := val.FieldByName(fname)
					if !field.IsValid() {
						return nil, fmt.Errorf("invalid field name: %s", fname)
					}
					m[fname] = field.Interface()
				}
				ml = append(ml, m)
			}
		}
		return ml, nil
	}
	return nil, err
}

// UpdateAiceUsers updates AiceUsers by Id and returns error if
// the record to be updated doesn't exist
func UpdateAiceUsersById(m *AiceUsers) (err error) {
	o := orm.NewOrm()
	v := AiceUsers{Userid: m.Userid}
	// ascertain id exists in the database
	if err = o.Read(&v); err == nil {
		var num int64
		if num, err = o.Update(m); err == nil {
			fmt.Println("Number of records updated in database:", num)
		}
	}
	return
}

// DeleteAiceUsers deletes AiceUsers by Id and returns error if
// the record to be deleted doesn't exist
func DeleteAiceUsers(id string) (err error) {
	o := orm.NewOrm()
	v := AiceUsers{Userid: id}
	// ascertain id exists in the database
	if err = o.Read(&v); err == nil {
		var num int64
		if num, err = o.Delete(&AiceUsers{Userid: id}); err == nil {
			fmt.Println("Number of records deleted in database:", num)
		}
	}
	return
}