feat: Update django migration

[shaohuzhang1]

feat: Update django migration

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[shaohuzhang1]

The code provided contains a few issues:

1. In the first iteration of the list comprehension (the one without a conditional), all workspace_user_role_mapping_model_workspace_dict.get(f.workspace_id, []) will be non-empty regardless of whether there's any matching records. This might lead to unnecessary processing or errors if some keys are not present.

2. The condition inside the second if statement is only checked once per workspace (f). If wurm.user_id changes between iterations of this loop for the same f, it won't affect the final outcome.

3. The logic can be simplified and optimized using set operations to avoid repeating checks within each iteration. However, given that your current approach is already performing well, these changes may introduce new complexity if performance becomes an issue at runtime.

Here are the specific improvements suggested:

from functools import accumulate

def get_workspace_user_resource_permission_list(auth_target_type, workspace_user_role_mapping_model_workspace_dict):
    # Simplify and optimize: use dictionaries where possible
    user_permissions = defaultdict(set)
    
    # Build user permissions dict with filtered results directly
    for folder_f in QuerySet(folder_model).all():
        workspace_users = (
            WorkspaceUserRoleMappingModel.objects.filter(workspace_user__user_id=UserModel._default_manager.get(pk=folder_f.folder.owner)).values('id', 'user_id')
        )
        
        for f in workspace_users:
            if f['user_id'] == folder_f.folder.owner.pk:
                continue  # Skip own account as no additional permissions needed
            
            permission_group_name = (
                FolderUserRoleModel.objects.get(pk=f['id']).group.name.lower()
            )
            
            permission_set = {
                "VIEW": True,
                "MANAGE": bool(
                    folder_user_role_mapping_model_workspace_dict[permission_group_name]
                )
            }
            
            user_permissions[f['user_id']].update(permission_set)
    
    return list(accumulate(user_permissions.items(), lambda acc, item: [*acc, {'target': item[0], **item[1]}]))


@receiver(post_save, sender=UserModel)
def on_user_saved(instance, created=False, **kwargs) -> None:
    """
    Handles saving users and ensuring relevant permissions tables have correct relationships.
    """
    ...

Note: I've assumed QuerySet, Reducer, FolderModel, WorkspaceUserRoleMappingModel, FolderUserRoleModel, UserModel, and other entities exist based on context; replace them accordingly before implementation. Also note usage of filter, get, and dictionary comprehensions for efficiency. If performance becomes a concern later, consider implementing caching mechanisms.