feat(genai): Add generate content with routing option

Author: nardosalemu

genai/controlled_generation/ctrlgen_with_enum_schema.go

@@ -39,7 +39,7 @@ func generateWithEnumSchema(w io.Writer) error {
 	contents := []*genai.Content{
 		{Parts: []*genai.Part{
 			{Text: "What type of instrument is an oboe?"},
-		}},
+		}, Role: "user"},
 	}
 	config := &genai.GenerateContentConfig{
 		ResponseMIMEType: "text/x.enum",

genai/controlled_generation/ctrlgen_with_nullable_schema.go

@@ -49,7 +49,8 @@ Finally, Saturday rounds off the week with sunny skies, a temperature of 80°F,
 	contents := []*genai.Content{
 		{Parts: []*genai.Part{
 			{Text: prompt},
-		}},
+		},
+			Role: "user"},
 	}
 	config := &genai.GenerateContentConfig{
 		ResponseMIMEType: "application/json",

genai/controlled_generation/ctrlgen_with_resp_schema.go

@@ -57,7 +57,8 @@ func generateWithRespSchema(w io.Writer) error {
 	contents := []*genai.Content{
 		{Parts: []*genai.Part{
 			{Text: "List a few popular cookie recipes."},
-		}},
+		},
+			Role: "user"},
 	}
 	modelName := "gemini-2.0-flash-001"
 

genai/count_tokens/counttoken_compute_with_txt.go

@@ -40,7 +40,8 @@ func computeWithTxt(w io.Writer) error {
 	contents := []*genai.Content{
 		{Parts: []*genai.Part{
 			{Text: "What's the longest word in the English language?"},
-		}},
+		},
+			Role: "user"},
 	}
 
 	resp, err := client.Models.ComputeTokens(ctx, modelName, contents, nil)

genai/count_tokens/counttoken_resp_with_txt.go

@@ -40,7 +40,8 @@ func generateTextAndCount(w io.Writer) error {
 	contents := []*genai.Content{
 		{Parts: []*genai.Part{
 			{Text: "Why is the sky blue?"},
-		}},
+		},
+			Role: "user"},
 	}
 
 	resp, err := client.Models.GenerateContent(ctx, modelName, contents, nil)

genai/count_tokens/counttoken_with_txt_vid.go

@@ -43,7 +43,8 @@ func countWithTxtAndVid(w io.Writer) error {
 				FileURI:  "gs://cloud-samples-data/generative-ai/video/pixel8.mp4",
 				MIMEType: "video/mp4",
 			}},
-		}},
+		},
+			Role: "user"},
 	}
 
 	resp, err := client.Models.CountTokens(ctx, modelName, contents, nil)

genai/text_generation/textgen_code_with_pdf.go

@@ -43,7 +43,8 @@ func generateWithPDF(w io.Writer) error {
 				FileURI:  "https://storage.googleapis.com/cloud-samples-data/generative-ai/text/inefficient_fibonacci_series_python_code.pdf",
 				MIMEType: "application/pdf",
 			}},
-		}},
+		},
+			Role: "user"},
 	}
 
 	resp, err := client.Models.GenerateContent(ctx, modelName, contents, nil)

genai/text_generation/textgen_transcript_with_gcs_audio.go

@@ -44,7 +44,8 @@ Use speaker A, speaker B, etc. to identify speakers.`},
 				FileURI:  "gs://cloud-samples-data/generative-ai/audio/pixel.mp3",
 				MIMEType: "audio/mpeg",
 			}},
-		}},
+		},
+			Role: "user"},
 	}
 
 	resp, err := client.Models.GenerateContent(ctx, modelName, contents, nil)

genai/text_generation/textgen_with_gcs_audio.go

@@ -45,7 +45,8 @@ Create a chapter breakdown with timestamps for key sections or topics discussed.
 				FileURI:  "gs://cloud-samples-data/generative-ai/audio/pixel.mp3",
 				MIMEType: "audio/mpeg",
 			}},
-		}},
+		},
+			Role: "user"},
 	}
 
 	resp, err := client.Models.GenerateContent(ctx, modelName, contents, nil)

genai/text_generation/textgen_with_mute_video.go

@@ -43,7 +43,8 @@ func generateWithMuteVideo(w io.Writer) error {
 				FileURI:  "gs://cloud-samples-data/generative-ai/video/ad_copy_from_video.mp4",
 				MIMEType: "video/mp4",
 			}},
-		}},
+		},
+			Role: "user"},
 	}
 
 	resp, err := client.Models.GenerateContent(ctx, modelName, contents, nil)