Reports

You're attempting to retrieve a User based on post content. However, multiple users might have posts with the same content, leading to ambiguity.

Why the Current Approach Doesn’t Work

Filtering posts by content alone doesn't specify which user to retrieve, as multiple users may have identical post content.

Recommended Solutions

1. Query Posts First, Then Retrieve the User

Retrieve posts matching the content, then use the UserID from the post to fetch the user:

var posts []Post
db.Where("content IN ?", []string{"Hello", "Good Morning", "Goodbye"}).Find(&posts)

var user User
for _, post := range posts {
    if post.UserID != "" {
        db.First(&user, post.UserID)  // Fetch the user
        break
    }
}

2. Use a JOIN to Fetch the User Directly

Perform a JOIN between the users and posts tables to retrieve the user:

var user User
db.Joins("JOIN posts ON posts.user_id = users.id").
    Where("posts.content IN ?", []string{"Hello", "Good Morning", "Goodbye"}).
    First(&user)

3. Retrieve All Users with Matching Posts

If multiple users can have posts with the same content, fetch all users with matching posts:

var users []User
db.Joins("JOIN posts ON posts.user_id = users.id").
    Where("posts.content IN ?", []string{"Hello", "Good Morning", "Goodbye"}).
    Find(&users)

Conclusion

To avoid ambiguity, either:

Query posts and use UserID to retrieve the user. Use a JOIN to directly fetch the user based on post content. This approach ensures you retrieve the correct user associated with the post content.

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