Invalid paremeter when passing an array

I have this curl.

curl -H "Content-Type: application/json" -X POST -d '{"file_server": {"method": "api/file", "parameter": [{"filepath":"tehnnhjhst", "FileBase64String":"test"}]}}' http://localhost:4000/api/some_method

But I got this JSON response:

{"errors":{"parameter":["is invalid"]}}

This is my model

schema "some_method" do
    field :method, :string
    field :parameter, :string


I just wanted to store the array as plain text/string to my MySql database.
Is there parse equivalent to this? or?
Any idea? Thank you.

1 Like

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.

1 Like

Yes im using changesets to my model.

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

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

1 Like

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

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

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

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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).

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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.

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I just hook it in JSON encode.

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