---
uid: module-building.templates-general.how-to-filter-templates
description: "How to filter which model instances produce template outputs by customising the GetModels method in a File Per Model template registration."
tags:
    - Metadata
    - Binding
---
# How to filter Template Instances

When creating Templates that are configured to create a _File per Model_, you may need to filter which Models create Template Instances. An easy place to do this is in the Template Registrations.

For this How-to Guide, we will imagine a use case where we want to _only_ create Repositories for Entities that have been flagged with a [Stereotype](https://docs.intentarchitect.com/docs-md/module-building/stereotypes/how-to-use-stereotypes/how-to-use-stereotypes.md). Let's assume that we have an `Entity Settings` Stereotype with a check-box (boolean) property `Has Repository`. It is configured to automatically apply to `Domain` entities.

Finally, we will assume that a C# Template called `RepositoryTemplate` has been created with the type `File Per Model` and Designer and Model Type set to `Domain` and `Class` retrospectively:

![csharp-template-repository](images/csharp-template-repository.png)

_Properties of the Repository Template, specified in the Module Builder._

To apply filtering to our Template, in the Visual Studio solution:

1. Navigate to the `RepositoryTemplateRegistration.cs` file.
2. Alter the `GetModels` method to filter based on the Stereotype, as follows:

    ```csharp
    public override IEnumerable<ClassModel> GetModels(IApplication application)
    {
        return _metadataManager.Domain(application).GetClassModels()
            .Where(x => x.GetEntitySettings().HasRepository())
            .ToList();
    }
    ```

3. Recompile the Project (`.csproj`).
4. Reinstall the Module and rerun the Software Factory Execution.

> [!TIP]
> Any metadata can be used to filter the creation of Template Instances. You may decide to use Stereotypes to be explicit or base the filtering on a convention like the name of the entity.

## See more

- [How to query models from different designers](https://docs.intentarchitect.com/docs-md/module-building/templates-general/how-to-query-models-from-different-designers/how-to-query-models-from-different-designers.md)