Hello.
I’m working on a system with multiple different widgets in a dashboard. I don’t have widget specific schema, I would like to keep this only using a form definition as there is no need for any validation or complex logic.
But I’m struggling with adding a dynamic rows for a nested form, I can’t get it work with to_form functionality introduced in Phoenix 1.7.
my_form = to_form(%{
"some_key" => "123",
"properties" => [
%{ "key" => "some_user_key", "value" => "some_user_value" },
%{ "key" => "another_user_key", "value" => "another_user_value" }
]
})
And I’m trying to setup the form for the nested properties
I’ve tried something like
<.inputs_for :let={f_nested} field={@my_form[:properties]} default={[]}>
<.input name="key" field={f_nested[:key] />
<.input name="value" field={f_nested[:value] />
</.inputs_for>
But this doesn’t work, it works if the properties would be a map, not an array.
I assume I need to iterate over the values, but not use how. Do I need to use inputs_for
function instead of the component and iterate over the result?
What is a correct way just using the to_form
achieve this? Or do I need to use ecto schemas to achieve this?
Thank you in advance.
It’s a little late, but I ran into a similar problem and found a solution.
It expects two-element tuples in the list. The first element is used only for sorting, and the second is the data for the nested form:
my_form = to_form(%{
"some_key" => "123",
"properties" => [
{1, %{ "key" => "some_user_key", "value" => "some_user_value" }},
{2, %{ "key" => "another_user_key", "value" => "another_user_value" }}
]
})
Or you can use a map instead of a list (default
attribute of inputs_for
still must be a list)
my_form = to_form(%{
"some_key" => "123",
"properties" => %{
1 => %{ "key" => "some_user_key", "value" => "some_user_value" },
2 => %{ "key" => "another_user_key", "value" => "another_user_value" }
}
})
1 Like
Can you expand on this? I’m trying to do something similar. Whenever I pass a form to inputs_for it complains about the field not being one of embeds one, embeds_many,… . Ideally I just want to store a load of key value pairs in a map in the database. I don’t want the hassle of having to deal with embedded schemas.
Form:
form_data = %{
"my_field" => %{
"1" => %{
"subfield1" => "value 1.1",
"subfield2" => "value 1.2",
"subfield3" => "value 1.3"
},
"2" => %{
"subfield1" => "value 2.1",
"subfield2" => "value 2.2",
"subfield3" => "value 2.3"
}
}
}
socket = assign(socket, form_data: form_data)
Template:
<.form :let={form} for={@form_data}>
<.inputs_for :let={subform} field={form[:my_field]} as={:my_field} default={[]}>
<div class="row">
<.input field=[subform[:subfield1] />
<.input field=[subform[:subfield2] />
<.input field=[subform[:subfield3] />
</div>
</.input>
</.form>