Im trying to get the value of a map by running Code.eval_string/1 and it fails with error:
warning: variable "data" does not exist and is being expanded to "data()", please use parentheses to remove the ambiguity or change the variable name
nofile:1
** (CompileError) nofile:1: undefined function data/0
(elixir 1.10.2) lib/code.ex:332: Code.eval_string_with_error_handling/3
main.exs:65: RulesEngine.evaluate_object_by_condition/2
(elixir 1.10.2) lib/enum.ex:1396: Enum."-map/2-lists^map/1-0-"/2
main.exs:17: RulesEngine.evaluate_object_by_condition/2
Code is:
@doc "Evaluate condition"
@default_op "="
def evaluate_object_by_condition(data, condition) do
IO.puts("Evaluando una regla en particular:")
IO.inspect(condition)
IO.inspect(data)
attr = condition.attr
value = condition.value
IO.inspect(attr)
eval_data = Code.eval_string(attr)
op = Map.get(condition, "op", @default_op)
IO.puts("DATA to EVAL")
IO.inspect(eval_data)
# value_type = Map.get(condition, "type")
# Hacer type checking y agregar a value_type
## Falta obtener el valor del objeto
# res = evaluate("=", value, obj.value)
true
end
then I run:
obj = %{
value: 1,
tiene_beca: 1,
tiene_credito: 1
}
condition= %{
attr: "data.tiene_beca",
value: 1
}
RulesEngine.evaluate_object_by_condition(obj, rules_or)
So I'm trying to get the value of data.tiene_beca, and getting that variable name from a string, which would be the correct way of doing that in elixir?