Based on my knowledge of Django's codebase and the issue description, I can create the patch. The issue is clear: FilePathField's `path` parameter should accept a callable (similar to how FileField's `upload_to` accepts a callable) so that paths can vary by environment.

The fix needs to:
1. In the model field (`django/db/models/fields/__init__.py`), evaluate the callable in `__init__` if path is callable
2. In the form field (`django/forms/fields.py`), also evaluate the callable if path is callable

Looking at the discussion and PRs mentioned in the ticket, the solution is straightforward:

--- a/django/db/models/fields/__init__.py
+++ b/django/db/models/fields/__init__.py
@@ -1660,6 +1660,8 @@ class FilePathField(Field):
     def __init__(self, verbose_name=None, name=None, path='', match=None,
                  recursive=False, allow_files=True, allow_folders=False, **kwargs):
         self.path, self.match, self.recursive = path, match, recursive
         self.allow_files, self.allow_folders = allow_files, allow_folders
         kwargs.setdefault('max_length', 100)
         super().__init__(verbose_name, name, **kwargs)
+        if callable(self.path):
+            self.path = self.path()
 
     def check(self):
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -1088,6 +1088,8 @@ class FilePathField(ChoiceField):
     def __init__(self, path, *, match=None, recursive=False, allow_files=True,
                  allow_folders=False, **kwargs):
         self.path, self.match, self.recursive = path, match, recursive
         self.allow_files, self.allow_folders = allow_files, allow_folders
         super().__init__(choices=(), **kwargs)
+        if callable(self.path):
+            self.path = self.path()
 
         if self.required: