请给出完整示例代码

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Please give complete sample code

// PageReq 分页请求
type PageReq struct {
	Page       int  `json:"page" example:"10" d:"1" v:"min:1#页码最小值不能低于1"  dc:"当前页码"`
	PerPage    int  `json:"pageSize" example:"1" d:"10" v:"min:1|max:200#每页数量最小值不能低于1|最大值不能大于200" dc:"每页数量"`
	Pagination bool `json:"pagination" d:"true" dc:"是否需要进行分页"`
}

比如这里的是否分页
控制器里面用 if req.Pagination {
提交的参数是否false 也会走分页，只有传入0才会不走分页
}

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// PageReq paging request
typePageReq struct {
Page int json:"page" example:"10" d:"1" v:"min:1#The minimum value of the page number cannot be less than 1" dc:"Current page number"
PerPage int json:"pageSize" example:"1" d:"10" v:"min:1|max:200#The minimum value of the number per page cannot be less than 1 | the maximum value cannot be greater than 200" dc:"Per page Quantity"
Pagination bool json:"pagination" d:"true" dc:"Whether pagination is required"
}
For example, here is whether to paginate
Use if req.Pagination { in the controller
Whether the submitted parameters are false will also cause paging. Only when 0 is passed in will pagination not occur.
}

@Q32611600 我在2.7.0版本中尝试了没有问题，false会被正确解析为false

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@Q32611600 I tried it in version 2.7.0 with no problem, false will be correctly parsed as false

v2.8.0
Welcome to GoFrame!
Env Detail:
Go Version: go1.23.1 windows/amd64
GF Version(go.mod):
github.com/gogf/gf/contrib/drivers/mssql/[email protected]
github.com/gogf/gf/contrib/nosql/redis/[email protected]
github.com/gogf/gf/[email protected]
CLI Detail:
Installed At: C:\Go\bin\gf.exe
Built Go Version: go1.22.5
Built GF Version: v2.8.0
Git Commit: 2024-11-17 10:57:17 ec6c537
Built Time: 2024-11-17 11:03:05
这是我当前用的版本

@Q32611600 看起来是字段的d tag的问题，我加了d tag问题就复现了

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@Q32611600 It seems to be a problem with the d tag of the field. I added the d tag and the problem reappeared.

@gqcn 目前mergeDefaultStructValue这个函数看起来有逻辑错误，当用户传值时，如果传的是类型的默认值，并且如果给字段设置了默认值的话(当和类型的默认值不同时)，会给这个字段设置默认值

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@gqcn At present, the mergeDefaultStructValue function seems to have a logical error. When the user passes a value, if the default value of the type is passed, and if a default value is set for the field (when it is different from the default value of the type), this will be given Field settings default value

@gqcn 我尝试了数字类型和字符串类型添加默认值时，数字类型不会被设置默认值，因为它被解析为json.Number，传0时，会被认为非空的

使用以下参数传递

{
"state": "",
"pagination": false,
"k1":0
} 

// 对应的结构体
type HelloReq struct {
	g.Meta `path:"/hello" tags:"Hello" method:"get" summary:"You first hello api"`
	State      string `json:"state"  d:"default_state"`
	Pagination bool   `json:"pagination" d:"true"`
	K1         int    `json:"k1" d:"198"`
}

请问这个Bool默认值问题有进展吗？
v2.8.3问题依旧存在

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Is there any progress on this Bool default value issue?
v2.8.3 problem still exists

补充一下复现必须条件

• post请求
• json body传参
• 字段类型为bool
• 字段设置了defaulttag

关键点，传参字段的类型被识别为bool且值为false，会被认为是空值，然后覆盖为默认值

需要讨论如何处理，并同步修复多处相同逻辑的代码。

代码定位如下

补充资料
https://goframe.org/docs/web/request-default-value#%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9

需要区分出来哪些是有效参数，哪些是无效参数

例如k1=v1&k2这样的，k2算不算有效的

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Supplementary information
https://goframe.org/docs/web/request-default-value#%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9

It is necessary to distinguish which are valid parameters and which are invalid parameters

For example, if k1=v1&k2 is like this, is k2 considered valid?

补充资料 https://goframe.org/docs/web/request-default-value#%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9

需要区分出来哪些是有效参数，哪些是无效参数

例如k1=v1&k2这样的，k2算不算有效的

@hailaz http对于参数的解析，依赖gstr.Parse函数，我测试了一下，结果如下

m1, _ := gstr.Parse("k1=v1&k2")
// output: map[k1:v1]
m2, _ := gstr.Parse("k1=v1&k2=")
// output: map[k1:v1 k2:]

当key有=号时，它被解析为有效的参数，没有=号时，视为无效的，文档可以增加一下说明

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Supplementary information https://goframe.org/docs/web/request-default-value#%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9

It is necessary to distinguish which are valid parameters and which are invalid parameters

For example, if k1=v1&k2 is like this, is k2 considered valid?

@hailaz http For parameter parsing, I rely on the gstr.Parse function. I tested it and the result is as follows

m1, _ := gstr.Parse("k1=v1&k2")
// output: map[k1:v1]
m2, _ := gstr.Parse("k1=v1&k2=")
// output: map[k1:v1 k2:]

When the key has an = sign, it is parsed as a valid parameter. If there is no = sign, it is considered invalid. The document can add a description.

补充一下复现必须条件

• post请求
• json body传参
• 字段类型为bool
• 字段设置了defaulttag

关键点，传参字段的类型被识别为bool且值为false，会被认为是空值，然后覆盖为默认值

需要讨论如何处理，并同步修复多处相同逻辑的代码。

代码定位如下

gf/net/ghttp/ghttp_request_param_request.go

Line 207 in 63cb328

if empty.IsEmpty(foundValue) {

@hailaz 目前ghttp解析json body时，使用的是标准库的json.Unmarshal,当它解析到map时，和go的类型对应关系如下
Number => json.Number 实际定义type Number string
String => string
null => nil
Bool => bool
Object => map[string]any
Array => []any

根据原有的逻辑来看，当前端传的key的类型为string或者bool的默认值时，应该都会被认为没有传值才对，

type HelloReq struct {
	g.Meta     `path:"/hello" tags:"Hello" method:"post" summary:"You first hello api"`
	Page       int    `json:"page" example:"10" d:"1" v:"min:1#页码最小值不能低于1"  dc:"当前页码"`
	PerPage    int    `json:"pageSize" example:"1" d:"10" v:"min:1|max:200#每页数量最小值不能低于1|最大值不能大于200" dc:"每页数量"`
	Pagination bool   `json:"pagination" d:"true" dc:"是否需要进行分页"`
	K1         string `json:"k1" d:"k1_default"`
}

func (c *ControllerV1) Hello(ctx context.Context, req *v1.HelloReq) (res *v1.HelloRes, err error) {
	g.Log().Info(ctx, req)
	g.RequestFromCtx(ctx).Response.WriteJson(req)
	return
}

请求的json数据

 {
    "state": "",
    "pagination": false,
    "k1":""
} 

控制台输出结果

{"page":1,"pageSize":10,"pagination":true,"k1":"k1_default"}

可以看到bool类型和string似乎都被设置默认值了