tojson fixes

Author: ardan-bkennedy

builtins.go

@@ -183,6 +183,7 @@ func builtinCycler(args []Value, kwargs map[string]Value) (Value, error) {
 func registerFilters(s *scope) {
 	filters := map[string]func([]Value, map[string]Value) (Value, error){
 		"tojson":     filterTojson,
+		"from_json":  filterFromjson,
 		"fromjson":   filterFromjson,
 		"items":      filterItems,
 		"join":       filterJoin,

jinja_test.go

@@ -94,6 +94,25 @@ func TestTojsonFilter(t *testing.T) {
 	}
 }
 
+func TestFromJSONFilter(t *testing.T) {
+	source := `{%- set data = data | from_json -%}{{ data.name }}:{{ data.value }}`
+	tmpl, err := jinja.Compile(source)
+	if err != nil {
+		t.Fatalf("compile: %v", err)
+	}
+
+	result, err := tmpl.Render(map[string]any{
+		"data": `{"name":"test","value":42}`,
+	})
+	if err != nil {
+		t.Fatalf("render: %v", err)
+	}
+
+	if result != "test:42" {
+		t.Errorf("got %q, want %q", result, "test:42")
+	}
+}
+
 func TestNamespace(t *testing.T) {
 	source := `{%- set ns = namespace(found=false) -%}
 {%- for item in items -%}