Nullstrike
How to pass a changeset with put_assoc in Phoenix Form tag
How to pass a changeset in phoenix form?
I use put_assoc function as I get the user struct from the cureent user that are assign to session.
Here’s a snippet from the controller:
def new(conn, _params) do
changeset = Blog.change_post(%Post{})
render(conn, "new.html", changeset: changeset)
end
But I get this error
key :user not found in: %{}
Here’s my post changeset:
def changeset(post, attrs) do
post
|> cast(attrs, [:title, :content, :is_published])
|> validate_required([:title, :content])
|> put_slug()
|> put_assoc(:user, attrs.user)
end
Marked As Solved
idi527
It seems like you are passing an empty attrs map in Blog.change_post(%Post{}) (the contents of the change_post/1 might be helpful), and in your changeset/2 you expect it to have a :user.
To avoid the error, try replacing your current change_post/1 with
def change_post(post) do
Ecto.Changeset.change(post)
end
then the changeset/2 won’t be called.
Also Liked
chensan
Since you are using Blog context in your code, I would suggest putting put_assoc in your context instead of messing your changeset/2, for example, you can define change_post/2 as bellow:
def change_post(%User{} = user, %Post{} = post) do
Post.changeset(post, %{})
|> put_assoc(:user, user)
end
Then in your new action:
def new(conn, _) do
changeset = Blog.change_post(conn.assigns.current_user, %Post{})
render(conn, "new.html", changeset: changeset)
end
Nullstrike
Yes it’s already been solved, I just forgot to marked this a solved.
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