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ash_phoenix
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Utilities for integrating Ash and Phoenix
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lib/ash_phoenix/form_data/query.ex
defimpl Phoenix.HTML.FormData, for: Ash.Query do
import AshPhoenix.FormData.Helpers
@impl true
def input_type(%{action: action}, _, field) do
argument = get_argument(action, field)
if argument do
type_to_form_type(argument.type)
else
:text_input
end
end
@impl true
def input_value(query, _form, field) do
case get_param(query, field) do
{:ok, value} -> value
:error -> ""
end
end
defp get_param(query, field) do
case Map.fetch(query.params, field) do
:error ->
Map.fetch(query.params, to_string(field))
{:ok, value} ->
{:ok, value}
end
end
@impl true
def to_form(query, form, field, opts) do
{name, opts} = Keyword.pop(opts, :as)
{id, opts} = Keyword.pop(opts, :id)
{prepend, opts} = Keyword.pop(opts, :prepend, [])
{append, opts} = Keyword.pop(opts, :append, [])
id = to_string(id || form.id <> "_#{field}")
name = to_string(name || form.name <> "[#{field}]")
arguments =
if query.action do
query.action.arguments
else
[]
end
arg =
Enum.find(
arguments,
&(&1.name == field || to_string(&1.name) == field)
)
{source, resource, data} =
if arg do
case get_embedded(arg.type) do
nil ->
raise "Cannot use `form_for` with an argument unless the type is an embedded resource"
resource ->
data = Ash.Query.get_argument(query, arg.name)
data =
case arg.type do
{:array, _} ->
List.wrap(data)
_ ->
data
end
{arg, resource, data}
end
else
raise "Cannot use `form_for` with anything except embedded resources in attributes/arguments"
end
data =
if is_list(data) do
Enum.reject(prepend ++ data ++ append, &(&1 == ""))
else
if data == "" do
nil
else
data
end
end
data
|> to_nested_form(
query,
source,
resource,
id,
name,
opts
)
|> List.wrap()
end
@impl true
def to_form(query, opts) do
{name, opts} = Keyword.pop(opts, :as)
name = to_string(name || form_for_name(query.resource))
id = Keyword.get(opts, :id) || name
action =
if AshPhoenix.hiding_errors?(query) do
nil
else
query.action && query.action.name
end
%Phoenix.HTML.Form{
action: action,
source: query,
impl: __MODULE__,
data: %{},
id: id,
name: name,
hidden: [],
errors: form_for_errors(query, opts),
params: query.params,
options: Keyword.put_new(opts, :method, "get")
}
end
@impl true
def input_validations(query, _, field) do
argument = get_argument(query.action, field)
if argument do
[required: !argument.allow_nil?] ++ type_validations(argument)
else
[]
end
end
defp type_validations(%{type: Ash.Types.Integer, constraints: constraints}) do
constraints
|> Kernel.||([])
|> Keyword.take([:max, :min])
|> Keyword.put(:step, 1)
end
defp type_validations(%{type: Ash.Types.Decimal, constraints: constraints}) do
constraints
|> Kernel.||([])
|> Keyword.take([:max, :min])
|> Keyword.put(:step, "any")
end
defp type_validations(%{type: Ash.Types.String, constraints: constraints}) do
if constraints[:trim?] do
# We should consider using the `match` validation here, but we can't
# add a title here, so we can't set an error message
# min_length = to_string(constraints[:min_length])
# max_length = to_string(constraints[:max_length])
# [match: "(\S\s*){#{min_length},#{max_length}}"]
[]
else
validations =
if constraints[:min_length] do
[min_length: constraints[:min_length]]
else
[]
end
if constraints[:min_length] do
Keyword.put(constraints, :min_length, constraints[:min_length])
else
validations
end
end
end
defp type_validations(_), do: []
end