MINOR: Feature/link element document (#457)

* add documents to elements

* add test for filterred ifc and document list

* typo

* add some query optimizations

Author: Bimdata-io

README.md

@@ -275,6 +275,7 @@ Class | Method | HTTP request | Description
 *IfcApi* | [**bulk_full_update_elements**](docs/IfcApi.md#bulk_full_update_elements) | **PATCH** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/bulk_update | Update many elements at once (only changing fields may be defined)
 *IfcApi* | [**bulk_full_update_ifc_property**](docs/IfcApi.md#bulk_full_update_ifc_property) | **PATCH** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/property/bulk_update | Update some fields of many properties of a model
 *IfcApi* | [**bulk_remove_classifications_of_element**](docs/IfcApi.md#bulk_remove_classifications_of_element) | **DELETE** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/classification/bulk_destroy | Remove many classifications from an element
+*IfcApi* | [**bulk_remove_documents_of_element**](docs/IfcApi.md#bulk_remove_documents_of_element) | **DELETE** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/documents/bulk_destroy | Remove many documents from an element
 *IfcApi* | [**bulk_remove_elements_from_classification**](docs/IfcApi.md#bulk_remove_elements_from_classification) | **DELETE** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/classification/{ifc_classification_pk}/element/bulk_destroy | Remove the classifications from all elements
 *IfcApi* | [**bulk_update_elements**](docs/IfcApi.md#bulk_update_elements) | **PUT** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/bulk_update | Update many elements at once (all field must be defined)
 *IfcApi* | [**bulk_update_ifc_property**](docs/IfcApi.md#bulk_update_ifc_property) | **PUT** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/property/bulk_update | Update all fields of many properties of a model
@@ -313,6 +314,7 @@ Class | Method | HTTP request | Description
 *IfcApi* | [**get_access_token**](docs/IfcApi.md#get_access_token) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/access_token/{token} | Retrieve one token created for this model
 *IfcApi* | [**get_access_tokens**](docs/IfcApi.md#get_access_tokens) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/access_token | Retrieve all tokens created for this model
 *IfcApi* | [**get_classifications_of_element**](docs/IfcApi.md#get_classifications_of_element) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/classification | Retrieve all classifications of an element
+*IfcApi* | [**get_documents_of_element**](docs/IfcApi.md#get_documents_of_element) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/documents | Retrieve all documents of an element
 *IfcApi* | [**get_element**](docs/IfcApi.md#get_element) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{uuid} | Retrieve an element of a model
 *IfcApi* | [**get_element_property_set**](docs/IfcApi.md#get_element_property_set) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/propertyset/{id} | Retrieve a PropertySet of an element
 *IfcApi* | [**get_element_property_set_properties**](docs/IfcApi.md#get_element_property_set_properties) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/propertyset/{propertyset_pk}/property | Retrieve all Properties of a PropertySet
@@ -354,11 +356,13 @@ Class | Method | HTTP request | Description
 *IfcApi* | [**get_zone_space**](docs/IfcApi.md#get_zone_space) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/zone/{zone_pk}/space/{id} | Retrieve one space of a zone
 *IfcApi* | [**get_zone_spaces**](docs/IfcApi.md#get_zone_spaces) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/zone/{zone_pk}/space | Retrieve all spaces of a zone
 *IfcApi* | [**get_zones**](docs/IfcApi.md#get_zones) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/zone | Retrieve zones of a model
+*IfcApi* | [**link_documents_of_element**](docs/IfcApi.md#link_documents_of_element) | **POST** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/documents | Link one or many documents to an element
 *IfcApi* | [**list_classification_element_relations**](docs/IfcApi.md#list_classification_element_relations) | **GET** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/classification-element | List all associations between classifications and elements
 *IfcApi* | [**merge_ifcs**](docs/IfcApi.md#merge_ifcs) | **POST** /cloud/{cloud_pk}/project/{project_pk}/ifc/merge | Merge IFC files
 *IfcApi* | [**optimize_ifc**](docs/IfcApi.md#optimize_ifc) | **POST** /cloud/{cloud_pk}/project/{project_pk}/ifc/{id}/optimize | Optimize the IFC
 *IfcApi* | [**remove_all_element_property_set**](docs/IfcApi.md#remove_all_element_property_set) | **DELETE** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/propertyset/all | Remove all property sets from element
 *IfcApi* | [**remove_classification_of_element**](docs/IfcApi.md#remove_classification_of_element) | **DELETE** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/classification/{id} | Remove a classification from an element
+*IfcApi* | [**remove_document_of_element**](docs/IfcApi.md#remove_document_of_element) | **DELETE** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/documents/{id} | Remove a documents from an element
 *IfcApi* | [**remove_element_property_set**](docs/IfcApi.md#remove_element_property_set) | **DELETE** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/propertyset/{id} | Remove a PropertySet from an element
 *IfcApi* | [**remove_element_property_set_property**](docs/IfcApi.md#remove_element_property_set_property) | **DELETE** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/propertyset/{propertyset_pk}/property/{id} | Remove a property from a PropertySet
 *IfcApi* | [**remove_element_property_set_property_definition**](docs/IfcApi.md#remove_element_property_set_property_definition) | **DELETE** /cloud/{cloud_pk}/project/{project_pk}/ifc/{ifc_pk}/element/{element_uuid}/propertyset/{propertyset_pk}/property/{property_pk}/propertydefinition/{id} | Remove a Definition from a Property