_actions

The _actions operator returns the response value for a preceding action in the same event list.

The action response object has the following structure:

error: Error,
index: number,
response: any,
skipped: boolean,
type: string,

Arguments

string

If the _actions operator is called with a string equal to a preceding action id in the same event list, the action response object returned. If a string is passed which does not match preceding action id in the same event list, null is returned. Dot notation is supported.

boolean

If the _actions operator is called with boolean argument true, an object with all the preceding action id responses in the same event list is returned.

Examples

Using a action response:

_actions: my_action.response

Returns: The response returned by the action.

Setting a action response to state:

id: refresh
type: Button
events:
  onClick:
    - id: get_fresh_data
      type: Request
      skip:
        _state: should_not_fetch
      params: get_data
    - id: set_data
      type: SetState
      params:
        did_not_fetch_data:
          _actions: get_fresh_data.skipped

Setting a returned JsAction response to state:

First register a custom JavaScript action: getNormalizedEigenvector

# file: lowdefy.yaml
lowdefy: '3.23.3'
app:
  html:
    appendHead: |
      <script type="text/javascript">
        const getNormalizedEigenvector = (context, ...args) => {
          const vectorLength = Math.sqrt(args.reduce((acc, curVal) => Math.pow(curVal, 2) + acc), 0);
          return args.map(val => val / vectorLength );
        }
        window.lowdefy.registerJsAction('getNormalizedEigenvector', getNormalizedEigenvector);
      </script>

Then, calculate the vector and update state.

# onClick event on a block.
id: calculate
type: Button
events:
  onClick:
    - id: get_normalized_eigenvector
      type: JsAction
      params:
        name: getNormalizedEigenvector
        args:
          - 1
          - 5
          - -12
          - 7
          - 4
    - id: update_state
      type: SetState
      params:
        normal_eigenvector:
          _actions: get_normalized_eigenvector.response

In this example, state will now be equal to:

normal_eigenvector:
  - 0.06523280730534423
  - 0.3261640365267211
  - -0.7827936876641306
  - 0.45662965113740955
  - 0.2609312292213769