How to build a Github APIv4 Golang query for a specific version

php editor Youzi will introduce to you how to build a specific version of Github APIv4 Golang query. Github APIv4 is a powerful query tool that can help developers obtain and process various data on Github. However, sometimes we may need to obtain a specific version of data, and the official API does not directly provide such a function. In this article, we will explore how to write custom queries using Golang to get a specific version of data.

Question content

Using https://github.com/shurcooL/githubv4, I'm really having trouble pulling back a specific version for the gh repository.

When there is a v3 version, the following code block always returns nothing:

var releaseQ struct {
  Repository struct {
    Release struct {
        Author githubv4.String
    } `graphql:"release(tagName:$tagName)"`
  } `graphql:"repository(owner:$repositoryOwner,name:$repositoryName)"`
}
variables = map[string]interface{}{
    "repositoryOwner": githubv4.String("jacobtomlinson"),
    "repositoryName":  githubv4.String("gha-find-replace"),
    "tagName":         githubv4.String("v3"),
}
err = client.Query(context.Background(), &releaseQ, variables)
if err != nil {
    fmt.Println("Query returned nothing")
}
fmt.Println("author:", releaseQ.Repository.Release.Author)

I have successfully obtained the following two code blocks for the repository description and issue reaction:

var repoDescriptionQ struct {
  Repository struct {
    Description string
  } `graphql:"repository(owner: \"jacobtomlinson\", name: \"gha-find-replace\")"`
}

This success returns the repository description ^

variables := map[string]interface{}{
  "repositoryOwner": githubv4.String("jacobtomlinson"),
  "repositoryName":  githubv4.String("gha-find-replace"),
  "issueNumber":     githubv4.Int(55),
  "reactionContent": githubv4.ReactionContentThumbsDown,
}
var reactionQ struct {
Repository struct {
    Issue struct {
        ID        githubv4.ID
        Reactions struct {
            ViewerHasReacted githubv4.Boolean
        } `graphql:"reactions(content:$reactionContent)"`
    } `graphql:"issue(number:$issueNumber)"`
} `graphql:"repository(owner:$repositoryOwner,name:$repositoryName)"`
}

This successfully got the response^

Workaround

Found that the author field is not a string, but of type "User". Change the requested field to "Description" which is a string and it is pulling back the posting information. If you really need an author, you need to define the user:

var releaseQ struct {
    Repository struct {
        Release struct {
            Description githubv4.String
        } `graphql:"release(tagName:$tagName)"`
    } `graphql:"repository(owner:$repositoryOwner,name:$repositoryName)"`
}

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