LauraBeatris
Recommend patterns for enum runtime validation
Disclaimer: I’m still a beginner when it comes to Elixir data types, so my apologies if the question sounds “silly”
Is there a recommended pattern for enum runtime validation in Elixir? For instance, the function above receives an argument called “intent” which can be only the following string values: ["sso", "dsync", "audit_logs", "log_streams"]
Is it possible to avoid even calling the function if the intent is not supported? Not sure if pattern matching could be used for that case?
def generate_link(params, opts) when is_map_key(params, :organization) and is_map_key(params, :intent) do
query = process_params(params, [:intent, :organization, :return_url, :success_url])
post("/portal/generate_link", query, opts)
end
Marked As Solved
cmo
def generate_link(%{intent: intent, organisation: _} = params, opts)
when intent in ["sso", "dsync", "audit_logs", "log_streams"] do
query = process_params(params, [:intent, :organization, :return_url, :success_url])
post("/portal/generate_link", query, opts)
end
The list in the guard needs to be a compile time list.
You can use a module attribute, i.e. @intents ~w[sso dsync audit_logs log_streams] if it is used in multiple places, or create a guard (see defguard) if the guard is used in multiple places.
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