example improvement suggestion

[huahuayu]

hi, tagexpr is powerful but the examples use so many variables like a b c d, which is not meaningful.
I suggest using some true scenario of any kind, say: validate an amount, email, phoneno, etc, which is more interesting and demonstrate the idea.

[zhu327]

suggest add some examples of Gin with tagexpr

[andeya]

No problem!

[mimicode]

type Request struct {
	Method  string       `json:"method" vd:"($=='GET' || $=='POST' || $=='PUT' || $=='DELETE' );msg:sprintf('invalid Method: %v',$)"`  
	Url     string       `json:"url" vd:"regexp('^http[s]?://.+');msg:sprintf('url无效地址: %v',$)"`                       
}

type FieldInfo struct {
	Name string `json:"name" vd:"regexp('^\\w+$');msg:'格式错误'"`
	Type     string           `json:"field_type" vd:"($=='string'||$=='object'||$=='int'||$=='float'||$=='array');msg:sprintf('%s类型有误%s',(Name)$,$)"`
	Label    string           `json:"label" vd:"len($)>0;msg:sprintf('%s的字段名称未填写',(Name)$)"`
	Descript string           `json:"descript" vd:"len($)>0;msg:sprintf('%s的字段说明未填写',(Name)$)"`
}

type StructName struct {
	Name            string     `json:"name" xorm:"name" vd:"@:len($)>0 && len($)<=15;msg:'请输入xxxx名称，不超过15个字'"`
	FieldName1    int64      `json:"organization" xorm:"organization" vd:"$>0;msg:'请选择xxxx'"`
	FieldName2        string     `json:"descript" xorm:"descript" vd:"@:len($)>0 && len($)<=200;msg:'请输入xxxx描述，不超过200个字'"`
	FieldName3           string     `json:"cover" xorm:"cover" vd:"len($)>0;msg:'请上传xxxx'"`
	FieldName4        int        `json:"openness" xorm:"openness" vd:"@:$>=1 && $<=3;msg:'请选择开xxxx'"`
}