Maps/Routes/Directions Forces Inclusion Of Polyline On The Response
Introduction
When working with the Google Maps API, specifically with the RoutesDirectionsRequest, you may encounter an issue where the polyline is always included in the response, even if you attempt to exclude it using the field mask property. This is due to the default value of the PolylineQuality property, which is always included in all requests. In this article, we will explore this issue in detail and provide a potential solution.
Understanding the Issue
The RoutesDirectionsRequest property PolylineQuality has a default value that prevents the use of the field mask property to exclude the Polyline property in the response object. This means that even if you specify a field mask that excludes the polyline, the polyline will still be included in the response.
Example Use Case
Let's consider an example where you want to retrieve toll information for a route without including the polyline information. You would typically use the field mask property to exclude the polyline, like this:
{
"request": {
"origin": "New York, NY",
"destination": "Los Angeles, CA",
"travelMode": "driving",
"unitSystem": google.maps.UnitSystem.METRIC,
"fields": ["toll_info", "polyline"]
}
}
However, as mentioned earlier, the PolylineQuality property is always included in the response, resulting in an error message:
{
"error_message": "No polyline is requested via field mask but polyline quality is specified"
}
Potential Solution
To resolve this issue, you can create a branch with a potential fix. One possible solution is to set the PolylineQuality property to a value that is not included in the default field mask. For example:
{
"request": {
"origin": "New York, NY",
"destination": "Los Angeles, CA",
"travelMode": "driving",
"unitSystem": google.maps.UnitSystem.METRIC,
"fields": ["toll_info"],
"polylineQuality": "simplified"
}
}
However, when attempting to push this branch to the origin, you may encounter an unauthorized response.
Unauthorized Response
When attempting to push the branch to the origin, you may receive an unauthorized response. This is likely due to a mismatch between the branch's credentials and the origin's credentials.
Possible Causes
There are several possible causes for this issue:
- Incorrect credentials: Make sure that the branch's credentials match the origin's credentials.
- Branch not pushed: Ensure that the branch has been pushed to the origin.
- Origin not updated: Verify that the origin has been updated to reflect the changes made in the branch.
Conclusion
In conclusion, the Maps/Routes/Directions API forces the inclusion of the polyline on the response due to the default value of the PolylineQuality property. This can be resolved by creating a branch with a potential fix, but may result in an unauthorized response when attempting to push it to the origin. By understanding the possible causes of this issue, you can take steps to resolve it and successfully push the branch to the origin.
Additional Resources
For more information on the Google Maps API, including the RoutesDirectionsRequest and field mask properties, please refer to the official documentation:
Troubleshooting Tips
If you encounter issues with pushing the branch to the origin, try the following troubleshooting tips:
- Verify credentials: Ensure that the branch's credentials match the origin's credentials.
- Check branch status: Verify that the branch has been pushed to the origin.
- Update origin: Ensure that the origin has been updated to reflect the changes made in the branch.
By following these tips and understanding the possible causes of the issue, you can successfully push the branch to the origin and resolve the Maps/Routes/Directions forces inclusion of polyline on the response issue.
Introduction
In our previous article, we explored the issue of the Maps/Routes/Directions API forcing the inclusion of the polyline on the response due to the default value of the PolylineQuality property. We also discussed a potential solution and troubleshooting tips to resolve the issue. In this article, we will provide a Q&A section to address common questions and concerns related to this issue.
Q&A
Q: What is the default value of the PolylineQuality property?
A: The default value of the PolylineQuality property is always included in the response, regardless of the field mask specified.
Q: Why is the polyline always included in the response?
A: The polyline is always included in the response because the PolylineQuality property has a default value that is not excluded by the field mask.
Q: How can I exclude the polyline from the response?
A: To exclude the polyline from the response, you can set the PolylineQuality property to a value that is not included in the default field mask, such as "simplified".
Q: What is the difference between the "simplified" and "full" polyline quality values?
A: The "simplified" polyline quality value reduces the number of points in the polyline, while the "full" polyline quality value includes all points in the polyline.
Q: Can I use the field mask property to exclude the polyline?
A: No, the field mask property cannot be used to exclude the polyline because the PolylineQuality property has a default value that is always included in the response.
Q: What is the error message "No polyline is requested via field mask but polyline quality is specified"?
A: This error message is returned when the field mask property is used to exclude the polyline, but the PolylineQuality property is still specified.
Q: How can I resolve the issue of the polyline being included in the response?
A: To resolve the issue, you can create a branch with a potential fix, such as setting the PolylineQuality property to a value that is not included in the default field mask.
Q: What are some troubleshooting tips to resolve the issue?
A: Some troubleshooting tips include verifying credentials, checking branch status, and updating the origin to reflect the changes made in the branch.
Additional Resources
For more information on the Google Maps API, including the RoutesDirectionsRequest and field mask properties, please refer to the official documentation:
Conclusion
In conclusion, the Maps/Routes/Directions API forces the inclusion of the polyline on the response due to the default value of the PolylineQuality property. By understanding the possible causes of this issue and using the troubleshooting tips provided, you can successfully resolve the issue and exclude the polyline from the response.
Frequently Asked Questions
- Q: What is the Maps/Routes/Directions API? A: The Maps/Routes/Directions API is a service provided by Google that allows developers to calculate routes and directions between two points.
- Q: What is the PolylineQuality property? A: The PolylineQuality property is a property of the RoutesDirectionsRequest that specifies the quality of the polyline returned in the response.
- Q: What is the field mask property? A: The field mask property is a property of the RoutesDirectionsRequest that specifies which fields to include or exclude in the response.