Add a toggle to disable "omitempty" (#282)

Disable omitempty

Author: ptodev

pkg/generator/config.go

@@ -16,6 +16,11 @@ type Config struct {
 	OnlyModels          bool
 	MinSizedInts        bool
 	Loader              schemas.Loader
+	// When DisableOmitempty is set to true,
+	// an "omitempty" tag will never be present in generated struct fields.
+	// When DisableOmitempty is set to false,
+	// an "omitempty" tag will be present for all fields that are not required.
+	DisableOmitempty bool
 }
 
 type SchemaMapping struct {

pkg/generator/generate.go

@@ -224,3 +224,7 @@ func (g *Generator) makeEnumConstantName(typeName, value string) string {
 
 	return typeName + idv
 }
+
+func (g *Generator) DisableOmitempty() bool {
+	return g.config.DisableOmitempty
+}

pkg/generator/schema_generator.go

@@ -776,7 +776,7 @@ func (g *schemaGenerator) addStructField(
 
 	tags := ""
 
-	if isRequired {
+	if isRequired || g.DisableOmitempty() {
 		for _, tag := range g.config.Tags {
 			tags += fmt.Sprintf(`%s:"%s" `, tag, name)
 		}

tests/data/disableOmitempty/omitempty.go

@@ -0,0 +1,10 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "id": "https://example.com/imported",
+    "type": "object",
+    "properties": {
+        "importedString": {
+            "type": "string"
+        }
+    }
+}

tests/data/disableOmitempty/omitempty.json

@@ -38,6 +38,15 @@ func TestCore(t *testing.T) {
 	testExamples(t, basicConfig, "./data/core")
 }
 
+func TestOmitempty(t *testing.T) {
+	t.Parallel()
+
+	cfg := basicConfig
+	cfg.DisableOmitempty = true
+
+	testExamples(t, cfg, "./data/disableOmitempty")
+}
+
 func TestValidation(t *testing.T) {
 	t.Parallel()