fix(vertex_ai): handle null predictions (#17211)

SelaseKay · web-flow · commit d559703d7190 · 2025-03-31T09:18:59.000Z
diff --git a/packages/firebase_vertexai/firebase_vertexai/lib/src/imagen_content.dart b/packages/firebase_vertexai/firebase_vertexai/lib/src/imagen_content.dart
@@ -104,7 +104,7 @@ final class ImagenGenerationResponse<T extends ImagenImage> {
   /// Factory method to create an [ImagenGenerationResponse] from a JSON object.
   factory ImagenGenerationResponse.fromJson(Map<String, dynamic> json) {
     final predictions = json['predictions'];
-    if (predictions.isEmpty) {
+    if (predictions == null || predictions.isEmpty) {
       throw ServerException('Got empty prediction with no reason');
     }
 

Original file line number	Diff line number	Diff line change
`@@ -104,7 +104,7 @@ final class ImagenGenerationResponse<T extends ImagenImage> {`
`104`	`104`	`/// Factory method to create an [ImagenGenerationResponse] from a JSON object.`
`105`	`105`	`factory ImagenGenerationResponse.fromJson(Map<String, dynamic> json) {`
`106`	`106`	`final predictions = json['predictions'];`
`107`		`- if (predictions.isEmpty) {`
	`107`	`+ if (predictions == null \|\| predictions.isEmpty) {`
`108`	`108`	`throw ServerException('Got empty prediction with no reason');`
`109`	`109`	`}`
`110`	`110`