Transformer
The transformer action is a drag and drop action that allows you to transform the data in your workflow.
The transformer takes a source input and a target output, allowing you to expand objects, iterate over arrays, and use selectors from previous nodes in your boards.
Initial Configuration
The initial configuration of transformer assumes the source and target are the nearest connected nodes. To initialise the transformer, click configure:
Initial transformer config
Override Input
Additionally - you can configure the input to be from any previous node in your flow. Furthermore, you can select parts
of data from a previous node. The only restriction is that the data you select must be an object type.
Override transformer input
Initial View - Leaf (Source/Target) Nodes
The initial view of the transformer is the leaf nodes, these are the source and target nodes. The source node is the data that is being transformed, and the target node is the output of the transformer.
The source node is defined as per the above initial configuration or the overridden input. The target node is defined by the next connected node in the flow.
Initial transformer nodes
Getting Started
The Transformer has multiple tools available to help navigate your data tree and to help deal with nested objects and arrays iterations.
You can drag an edge (line) between two properties to connect them. This will map these two properties together. You can also add tools by hovering over the circles on the properties and clicking on the plus button that appears, bringing out the tool menu and clicking on one of the tool names.
Available transformer tools
Expanding objects
Object properties can be expanded in both source and target nodes. Expanding an object property will allow you to access the properties of the object as individual properties in the transformer:
Expanded objects
Handling arrays/lists
The Transformer has 3 tools currently for working with arrays/lists: For Each, List Builder and List Generator.
For Each
The For Each tool allows you to iterate over an array and perform actions on each item in the array. This tool can
only be used as a source tool and must be used in conjunction with the List Generator tool.
Using the for each tool on lists
List Generator
The List Generator allows you to generate a list of items, this tool must be used alongside the For Each tool - so
that on every iteration of the For Each tool, it will generate a new item in the list. This tool can only be used as a
target tool.
Generate a dynamic list of items
List Builder
The List Builder tool allows you to manually build a list of items - for example if you want to build a list with only
one element, using parent properties of the source. This tool should be used as a target tool. You can click on the plus
button at the bottom of the tool to add another element to the list.
Create a known list of items from any source
Other Tools
Additionally - there is also a Selector tool, which allows you to step back out of the tranformer and select a value
from a previous node in your board. This tool should be used as a target tool.
Select a value from a previous node
And finally there’s the Constant tool, which allows you to add a constant value to your transformer. The type is based
on the type of the property you’re connecting to. This tool should also be used as a target tool.
Input a hardcoded value
Validation
The transformer will validate your configuration as you go, and will highlight any errors in red. Currently this just validates the property data type.
Validation errors
That’s it!
All of these tools will allow you to build up a complex transformation of your data, empowering you to build powerful workflows.
Final transformer config