How to Resolve Import Conflicts Between `appengine` and `google.golang.org/appengine` in Google App Engine?

Importing Appengine: Appengine, Google API, and Third-Party Libraries

In your Google App Engine project, you have successfully imported "appengine/datastore." However, you now encounter errors when importing a third-party library that uses App Engine packages with the path "google.golang.org/appengine."

To resolve this conflict, you have two options:

Option 1: Alias the Import Paths

You can use aliases to import both the old and new App Engine packages in parallel. This allows you to use both appengine and google.golang.org/appengine. For example:

import (
   oldAppengine "appengine"
   "google.golang.org/appengine"
)

Option 2: Use the New Import Path

If you prefer to use the new import path, update all your App Engine imports to use "google.golang.org/appengine." This ensures consistency and avoids the need for aliases.

Deployment Considerations

When deploying your application to App Engine, note that the old import paths will eventually be deprecated. If you use both paths, you may get errors during the build process. Therefore, it is recommended to use the new import path for all App Engine imports to avoid potential deployment issues.

Third-Party Compatibility

If the third-party library you're using requires the new import path, you may need to update the library to work with both sets of imports. This can be done by creating an alias within the third-party library.

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