CRUD

The CRUD methods are used to create, read, update and delete functions. There are two ways to use them. The first is through the SDK and the second is through the Project object. The syntax is the same for all CRUD methods. If you want to manage functions from the project, you can use the Project object and avoid to specify the project parameter. In this last case, you need to specify every parameter as keyword argument. In any case, you need to first import the SDK and instantiate a Project object that will be the context in which you can manage entities.

Example:

import digitalhub as dh

project = dh.get_or_create_project("my-project")

# Use CRUD method on project

function = project.new_function(name="my-function",
                                kind="python",
                                code_src="function.py",
                                handler="function-handler")

# Use CRUD method from SDK

function = dh.new_function(project="my-project",
                           name="my-function",
                           kind="python",
                           code_src="function.py",
                           handler="function-handler")

A function entity can be managed with the following methods.

Create:

new_function

Read:

get_function
get_function_versions
import_function
list_functions

Update:

update_function

Delete:

delete_function

Create

You can create a function with the new_function(). The kwargs parameters are determined by the kind of the object, and are described in the kinds section.

New

This function create a new entity and saves it into the backend.

`new_function`

Parameters:

Name	Type	Description	Default
`project`	`str`	Project name.	required
`name`	`str`	Object name.	required
`kind`	`str`	Kind the object.	required
`uuid`	`str`	ID of the object.	`None`
`description`	`str`	Description of the object (human readable).	`None`
`labels`	`list[str]`	List of labels.	`None`
`embedded`	`bool`	Flag to determine if object spec must be embedded in project spec.	`False`
`**kwargs`	`dict`	Spec keyword arguments.	`{}`

Returns:

Type	Description
`Function`	Object instance.

Examples:

>>> obj = new_function(project="my-project",
>>>                    name="my-function",
>>>                    kind="python",
>>>                    code_src="function.py",
>>>                    handler="function-handler")

Read

To read functions you can use the get_function(), get_function_versions(), list_functions() or import_function() functions.

Get

This function searches for a single function into the backend. If you want to collect a function from the backend using get_function(), you have two options:

The first one is to use the key parameter which has the pattern store://<project-name>/<entity-type>/<entity-kind>/<entity-name>:<entity-id>.
The second one is to use the entity name as identifier, the project name as project and the entity id as entity_id parameters. If you do not specify the entity id, you will get the latest version.

`get_function`

Parameters:

Name	Type	Description	Default
`identifier`	`str`	Entity key (store://...) or entity name.	required
`project`	`str`	Project name.	`None`
`entity_id`	`str`	Entity ID.	`None`
`**kwargs`	`dict`	Parameters to pass to the API call.	`{}`

Returns:

Type	Description
`Function`	Object instance.

Examples:

Using entity key:

>>> obj = get_function("store://my-function-key")

Using entity name:

>>> obj = get_function("my-function-name"
>>>                    project="my-project",
>>>                    entity_id="my-function-id")

Get versions

This function returns all the versions of a function from the backend.

`get_function_versions`

Parameters:

Name	Type	Description	Default
`identifier`	`str`	Entity key (store://...) or entity name.	required
`project`	`str`	Project name.	`None`
`**kwargs`	`dict`	Parameters to pass to the API call.	`{}`

Returns:

Type	Description
`list[Function]`	List of object instances.

Examples:

Using entity key:

>>> obj = get_function_versions("store://my-function-key")

Using entity name:

>>> obj = get_function_versions("my-function-name"
>>>                             project="my-project")

List

This function returns all the latest functions from the backend related to a project.

`list_functions`

Parameters:

Name	Type	Description	Default
`project`	`str`	Project name.	required
`**kwargs`	`dict`	Parameters to pass to the API call.	`{}`

Returns:

Type	Description
`list[Function]`	List of object instances.

Examples:

>>> objs = list_functions(project="my-project")

Import

This function load the function from a local yaml file descriptor.

`import_function`

Parameters:

Name	Type	Description	Default
`file`	`str`	Path to YAML file.	required

Returns:

Type	Description
`Function`	Object instance.

Examples:

>>> obj = import_function("my-function.yaml")

Update

To update a function you can use the update_function() method.

`update_function`

Parameters:

Name	Type	Description	Default
`entity`	`Function`	Object to update.	required

Returns:

Type	Description
`Function`	Entity updated.

Examples:

>>> obj = update_function(obj)

Delete

To delete a function you can use the delete_function() method.

`delete_function`

Parameters:

Name	Type	Description	Default
`identifier`	`str`	Entity key (store://...) or entity name.	required
`project`	`str`	Project name.	`None`
`entity_id`	`str`	Entity ID.	`None`
`delete_all_versions`	`bool`	Delete all versions of the named entity. If True, use entity name instead of entity key as identifier.	`False`
`cascade`	`bool`	Cascade delete.	`True`
`**kwargs`	`dict`	Parameters to pass to the API call.	`{}`

Returns:

Type	Description
`dict`	Response from backend.

Examples:

If delete_all_versions is False:

>>> obj = delete_function("store://my-function-key")

Otherwise:

>>> obj = delete_function("function-name",
>>>                       project="my-project",
>>>                       delete_all_versions=True)