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

# block_registration

# `prefect.server.models.block_registration`

## Functions

### `register_block_schema` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/server/models/block_registration.py#L56" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
register_block_schema(session: AsyncSession, block_schema: Union[schemas.core.BlockSchema, 'ClientBlockSchema']) -> UUID
```

Stores the provided block schema in the Prefect REST API database.

If a block schema with a matching checksum and version is already saved,
then the ID of the existing block schema will be returned.

**Args:**

* `session`: A database session.
* `block_schema`: A block schema object.

**Returns:**

* The ID of the registered block schema.

### `register_block_type` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/server/models/block_registration.py#L92" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
register_block_type(session: AsyncSession, block_type: Union[schemas.core.BlockType, 'ClientBlockType']) -> UUID
```

Stores the provided block type in the Prefect REST API database.

If a block type with a matching slug is already saved, then the block type
will be updated to match the passed in block type.

**Args:**

* `session`: A database session.
* `block_type`: A block type object.

**Returns:**

* The ID of the registered block type.

### `run_block_auto_registration` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/prefect/server/models/block_registration.py#L211" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python theme={null}
run_block_auto_registration(session: AsyncSession) -> None
```

Registers all blocks in the client block registry and any blocks from Prefect
Collections that are configured for auto-registration.

**Args:**

* `session`: A database session.