fix(dbml): export array fields without quotes (#911)

src/lib/dbml/dbml-export/__tests__/cases/3.dbml

@@ -0,0 +1,8 @@
+Table "public"."guy_table" {
+  "id" integer [pk, not null]
+  "created_at" timestamp [not null]
+  "column3" text
+  "arrayfield" text[]
+  "field_5" "character varying"
+  "field_6" "character varying(100)"
+}

src/lib/dbml/dbml-export/__tests__/cases/3.json

@@ -0,0 +1 @@
+{"id":"mqqwkkod7trl","name":"guy-db","databaseType":"postgresql","createdAt":"2025-09-10T18:45:32.817Z","updatedAt":"2025-09-10T19:15:21.682Z","tables":[{"id":"g2hv9mlo3qbyjnxdc44j1zxl2","name":"guy_table","schema":"public","x":100,"y":300,"fields":[{"id":"qdqgzmtxsi84ujfuktsvjuop8","name":"id","type":{"id":"integer","name":"integer"},"primaryKey":true,"unique":true,"nullable":false,"createdAt":1757529932816},{"id":"wsys99f86679ch6fbjryw0egr","name":"created_at","type":{"id":"timestamp_without_time_zone","name":"timestamp without time zone"},"primaryKey":false,"unique":false,"nullable":false,"createdAt":1757529932816},{"id":"ro39cba7sd290k90qjgzib8pi","name":"column3","type":{"id":"text","name":"text"},"primaryKey":false,"unique":false,"nullable":true,"createdAt":1757529932816},{"id":"6cntbu2orwk7kxlg0rcduqgbo","name":"arrayfield","type":{"id":"array","name":"array"},"primaryKey":false,"unique":false,"nullable":true,"createdAt":1757529932816},{"id":"7cz0ybdoov2m3wbgm9tlzatz0","name":"field_5","type":{"id":"character_varying","name":"character varying"},"unique":false,"nullable":true,"primaryKey":false,"createdAt":1757531685981},{"id":"zzwlyvqzz93oh0vv8f8qob103","name":"field_6","type":{"id":"character_varying","name":"character varying"},"unique":false,"nullable":true,"primaryKey":false,"createdAt":1757531713961,"characterMaximumLength":"100"}],"indexes":[{"id":"r0w71lnbnje2j9cz1t9j64rya","name":"guy_table_pkey","unique":true,"fieldIds":["qdqgzmtxsi84ujfuktsvjuop8"],"createdAt":1757529932816,"isPrimaryKey":true}],"color":"#8eb7ff","isView":false,"isMaterializedView":false,"createdAt":1757529932816,"diagramId":"mqqwkkod7trl"}],"relationships":[],"dependencies":[],"areas":[],"customTypes":[]}

src/lib/dbml/dbml-export/__tests__/export-sql-dbml-cases.test.ts

@@ -44,4 +44,24 @@ describe('DBML Export - Diagram Case 1 Tests', () => {
         // Compare the generated DBML with the expected DBML
         expect(generatedDBML).toBe(expectedDBML);
     });
+
+    it('should handle case 3 diagram', { timeout: 30000 }, async () => {
+        // Read the JSON file
+        const jsonPath = path.join(__dirname, 'cases', '3.json');
+        const jsonContent = fs.readFileSync(jsonPath, 'utf-8');
+
+        // Parse the JSON and convert to diagram
+        const diagram = diagramFromJSONInput(jsonContent);
+
+        // Generate DBML from the diagram
+        const result = generateDBMLFromDiagram(diagram);
+        const generatedDBML = result.standardDbml;
+
+        // Read the expected DBML file
+        const dbmlPath = path.join(__dirname, 'cases', '3.dbml');
+        const expectedDBML = fs.readFileSync(dbmlPath, 'utf-8');
+
+        // Compare the generated DBML with the expected DBML
+        expect(generatedDBML).toBe(expectedDBML);
+    });
 });

src/lib/dbml/dbml-export/dbml-export.ts

@@ -596,6 +596,13 @@ const normalizeCharTypeFormat = (dbml: string): string => {
         .replace(/character \(([0-9]+)\)/g, 'character($1)');
 };
 
+// Fix array types that are incorrectly quoted by DBML importer
+const fixArrayTypes = (dbml: string): string => {
+    // Remove quotes around array types like "text[]" -> text[]
+    // Matches patterns like: "fieldname" "type[]" and replaces with "fieldname" type[]
+    return dbml.replace(/(\s+"[^"]+"\s+)"([^"\s]+\[\])"/g, '$1$2');
+};
+
 // Fix table definitions with incorrect bracket syntax
 const fixTableBracketSyntax = (dbml: string): string => {
     // Fix patterns like Table [schema].[table] to Table "schema"."table"
@@ -985,12 +992,14 @@ export function generateDBMLFromDiagram(diagram: Diagram): DBMLExportResult {
             );
         }
 
-        standard = normalizeCharTypeFormat(
-            fixMultilineTableNames(
-                fixTableBracketSyntax(
-                    importer.import(
-                        baseScript,
-                        databaseTypeToImportFormat(diagram.databaseType)
+        standard = fixArrayTypes(
+            normalizeCharTypeFormat(
+                fixMultilineTableNames(
+                    fixTableBracketSyntax(
+                        importer.import(
+                            baseScript,
+                            databaseTypeToImportFormat(diagram.databaseType)
+                        )
                     )
                 )
             )
@@ -1007,7 +1016,9 @@ export function generateDBMLFromDiagram(diagram: Diagram): DBMLExportResult {
             standard = enumsDBML + '\n\n' + standard;
         }
 
-        inline = normalizeCharTypeFormat(convertToInlineRefs(standard));
+        inline = fixArrayTypes(
+            normalizeCharTypeFormat(convertToInlineRefs(standard))
+        );
 
         // Clean up excessive empty lines in both outputs
         standard = standard.replace(/\n\s*\n\s*\n/g, '\n\n');