> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bhuwanpandey.com.np/llms.txt
> Use this file to discover all available pages before exploring further.

# Templates & Events

## Templates

The templates can be completely overridden and some of them are:

* `list_template`: Template to use for list page. Default is fastdaisy\_admin/list.html.
* `create_template`: Template to use for creation page. Default is fastdaisy\_admin/create.html.
* `edit_template`: Template to use for edit page. Default is fastdaisy\_admin/edit.html.

```python theme={null}
class UserAdmin(ModelView):
    model = User
    list_template = "custom_list.html"

```

## Events

There are four methods that you can use to do some actions before or after a model was created, updated or deleted.

* `on_model_change`: Called before a model was created or updated.
* `after_model_change`: Called after a model was created or updated.
* `on_model_delete`: Called before a model was deleted.
* `after_model_delete`: Called after a model was deleted.

```python theme={null}

class UserAdmin(ModelView):
    model = User
    async def on_model_change(self, data, model, is_created, request):
        # Perform some other action
        ...

    async def on_model_delete(self, model, request):
        # Perform some other action
        ...

```

## Custom Action

The available options for an action include:

* `name`: If not explicitly provided, the function name will be used as the action name which is displayed in the action
  dropdown on the list page.

Although there is a built-in export feature that allows users to export records in CSV or JSON format,
the example below demonstrates how to create a custom action to export selected records.

```python {7-20,23} theme={null}

import json
from fastdaisy_admin import BaseView, action



@action(
        name="Export Json"
    )
async def export_to_json(modelview, request, objs):
    data = [
        {"id": u.id, "name": u.name, "email": u.email, "is_active": u.is_admin}
        for u in objs
    ]
    return Response(
        content=json.dumps(data, indent=2),
        media_type="application/json",
        headers={"Content-Disposition": "attachment; filename=users_export.json"}
    )

class UserAdmin(ModelView):
    model = User
    actions = [export_to_json]
    
admin.add_view(UserAdmin)

```

In the above example, we created `export_to_json` function, It can be define anywhere which should contain three argument.

* `modelview`: Instance of ModelView
* `request`: It's a HTTP request
* `objs`: Selected objects of respective modelview