Invalid paremeter when passing an array

You’ve defined :parameter as a :string but you’re passing an array, as you state. I would expect there to be an error.

Are you using changesets for your model? They help validate your datatypes with some nice error messages.

Yes im using changesets to my model.

def changeset(struct, params \\ %{}) do
    struct
    |> cast(params, [:method, :parameter])
    |> validate_required([:method, :parameter])
  end

So array in :string (varchar(255), utf8_general_ci in my MySql database) is not allowed?

I’m confused. An array is not a string. You should get an error message.

Thanks for your reply. So there is no way to handle array?

Yes, but I don’t know if MySQL handles array data types.

Thank you for your reply. I just wanted to store the “parameter” as a plain text to my database (Ignoring that it is an array).

Then send it as string. Or maybe hook into the json decode and make it a string there. I’m not sure if that one works though.

I just hook it in JSON encode.

params = Map.put(params, "parameter", Poison.encode!(params["parameter"])