Fix primitive decoder when evaluating Promise (#1432)

Signed-off-by: Samhita Alla <aallasamhita@gmail.com>

flytekit/core/promise.py

@@ -69,7 +69,6 @@ def extract_value(
         val_type: type,
         flyte_literal_type: _type_models.LiteralType,
     ) -> _literal_models.Literal:
-
         if isinstance(input_val, list):
             lt = flyte_literal_type
             python_type = val_type
@@ -142,17 +141,16 @@ def extract_value(
 
 
 def get_primitive_val(prim: Primitive) -> Any:
-    if prim.integer:
-        return prim.integer
-    if prim.datetime:
-        return prim.datetime
-    if prim.boolean:
-        return prim.boolean
-    if prim.duration:
-        return prim.duration
-    if prim.string_value:
-        return prim.string_value
-    return prim.float_value
+    for value in [
+        prim.integer,
+        prim.float_value,
+        prim.string_value,
+        prim.boolean,
+        prim.datetime,
+        prim.duration,
+    ]:
+        if value is not None:
+            return value
 
 
 class ConjunctionOps(Enum):

tests/flytekit/unit/core/test_conditions.py

@@ -71,6 +71,22 @@ def multiplier_2(my_input: float) -> float:
         multiplier_2(my_input=10.0)
 
 
+def test_condition_else_int():
+    @workflow
+    def multiplier_3(my_input: int) -> float:
+        return (
+            conditional("fractions")
+            .if_((my_input >= 0) & (my_input < 1.0))
+            .then(double(n=my_input))
+            .elif_((my_input > 1.0) & (my_input < 10.0))
+            .then(square(n=my_input))
+            .else_()
+            .fail("The input must be between 0 and 10")
+        )
+
+    assert multiplier_3(my_input=0) == 0
+
+
 def test_condition_sub_workflows():
     @task
     def sum_div_sub(a: int, b: int) -> typing.NamedTuple("Outputs", sum=int, div=int, sub=int):