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lib/peri/invalid_schema.ex
defmodule Peri.InvalidSchema do
@moduledoc """
Exception raised when an invalid schema is encountered.
This exception is raised with a list of `Peri.Error` structs,
providing a readable message overview of the validation errors.
"""
defexception [:message, :errors]
@type t :: %__MODULE__{
message: String.t(),
errors: [Peri.Error.t()]
}
@impl true
def exception(errors) do
%__MODULE__{
message: format_errors(errors),
errors: errors
}
end
defp format_errors(errors) do
Enum.map_join(errors, "\n", &format_error/1)
end
defp format_error(%Peri.Error{
message: message,
content: content,
path: path,
key: key,
errors: nested_errors
}) do
error_details = [
"Error in #{Enum.join(path, " -> ")}:",
" Key: #{key}",
" Message: #{message}",
format_content(content)
]
nested_error_details =
if nested_errors do
Enum.map_join(nested_errors, "\n", &(" " <> format_error(&1)))
else
""
end
(error_details ++ [nested_error_details])
|> Enum.reject(&(&1 == ""))
|> Enum.join("\n")
end
defp format_content(nil), do: ""
defp format_content(content), do: " Content: #{inspect(content, pretty: true)}"
end