golang bind array and input one by one-CodePudding

I am trying to bind the array type and put the values contained in the array one by one

i tried for loop but have json return, so only 1 is stored

like this

log_id|tag_id|
------ ------ 
1     |     1|

http body

{
    "LogId" : 1
    "tags" : [1,2,3,4,5,6,7,8,9]
}

    var binder struct {
        LogId      uuid.UUID           `json:"logId"`
        TagId      []int32             `json:"tags"`
    }

    json.Unmarshal([]byte(c.Request().Body), &binder)

    err := h.UseCases.CreateReviewLogUseCase.Use(c.Ctx(),
        database.ReviewLogDenyTag{
            LogID: binder.LogId,
            TagID: binder.TagId,
        })

    return c.JSON(http.StatusCreated, map[string]string{
        "message": "success",
    })

how to execute like this

log_id|tag_id|
------ ------ 
1     |     1|
1     |     2|
1     |     3|
1     |     4|
1     |     5|
1     |     6|
1     |     7|
1     |     8|
1     |     9|

thank you

CodePudding user response：

It looks like your issue is that you're not actually iterating over your list of tags. Every programming language out there has a syntax allowing you to do this, usually called a for-loop. In Go, for loops have a couple of valid syntaxes: for {starting}; {ending}; {update} {} like in C, or for {index}, {value} := range {collection} {}. The first syntax, although usable, isn't the best for your use case so we'll go with the second. Applying it gives:

for _, tag := range binder.TagId {
    err := h.UseCases.CreateReviewLogUseCase.Use(c.Ctx(),
        database.ReviewLogDenyTag{
            LogID: binder.LogId,
            TagID: tag,
        })
}

What this is doing is iterating over every entry in binder.TagId, which is a slice of integers, and extracting the value and index of each item. In this example we discard the index as it isn't needed and use the value directly.