feat(logic): json_prolog/2 handle null json value

axone-protocol · Apr 26, 2023 · 94e9c5b · 94e9c5b
1 parent 7679f94
commit 94e9c5b
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Showing 3 changed files with 14 additions and 0 deletions.
diff --git a/x/logic/predicate/json.go b/x/logic/predicate/json.go
@@ -66,6 +66,8 @@ func jsonToTerms(value any) (engine.Term, error) {
 		return engine.Integer(r.Int64()), nil
 	case bool:
 		return AtomBool(v), nil
+	case nil:
+		return AtomNull, nil
 	case map[string]any:
 		keys := lo.Keys(v)
 		sort.Strings(keys)

diff --git a/x/logic/predicate/json_test.go b/x/logic/predicate/json_test.go
@@ -118,6 +118,16 @@ func TestJsonProlog(t *testing.T) {
 				}},
 				wantSuccess: true,
 			},
+			// ** JSON -> Prolog **
+			// Null
+			{
+				description: "convert json null value into prolog",
+				query:       `json_prolog('null', Term).`,
+				wantResult: []types.TermResults{{
+					"Term": "@(null)",
+				}},
+				wantSuccess: true,
+			},
 		}
 		for nc, tc := range cases {
 			Convey(fmt.Sprintf("Given the query #%d: %s", nc, tc.query), func() {

diff --git a/x/logic/predicate/util.go b/x/logic/predicate/util.go
@@ -85,3 +85,5 @@ func AtomBool(b bool) engine.Term {
 	}
 	return engine.NewAtom("@").Apply(r)
 }
+
+var AtomNull = engine.NewAtom("@").Apply(engine.NewAtom("null"))