Container Output (JSON)

Reads the content of a JSON column and makes it available to an external caller. This node is used in workflows deployed as REST services, where the result of the web service is represented by the input of this node. By default a JSON array is returned, where each row of the input table is an element in the array. Tables with no or only one row result in an array with zero or one element. This behavior can be changed in the dialog, see the settings below.

Options

Parameter Name

A name, which serves as key in the resulting JSON object. This is used to assert uniqueness in case multiple output results (nodes) are present in workflow.

Append unique ID to parameter name

If checked, the name set above will be amended by the node's ID to guarantee unique parameter names. Usually it's a good idea to have this box not checked and instead make sure to use meaningful and unique names in all container nodes present in a workflow.

JSON Column

The column containing the JSON result. All other columns are ignored.

Description

A description for the output parameter. The description is shown in the API specification of the REST interface.

Keep single-row tables simple

For the special case that the input table contains one row with a non-missing JSON value this value is taken as result and not wrapped into a JSON array.

Fill example JSON from input data

Fill the example JSON field below with data from the input table. This requires that preceding nodes have been executed and that a JSON column is selected above.

Example

A JSON representing an example of what output received by this node may look like. Mainly used for populating the "example" field of the generated OpenAPI output parameter specification, which is presented to end users for documentation purposes. The content of this node can be filled from input data (if preceding nodes are executed.)

Views

JSON Snapshot

Shows the JSON structure as read from the input (possibly converted into JSON array)

Workflows

• _01_TestWF_Fails_Then_SucceedsKNIME Hub
• _02_TestWF_FailsKNIME Hub
• _03_TestWF_SucceedsKNIME Hub
• _Configuration_TemplateKNIME Hub
• _Predictor_FlowKNIME Hub
• Show all 177 workflows

Links

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Developers