Transform objects to a flat list, keep the unique values

How to transform objects to a flat list, and keep the unique values

This article explains how you change the following data structure:

"uniqueConfig": {
    "color": {
        "config": [
            {
                "color": "smokingblack matt"
            },
            {
                "color": "smokingblack matt"
            },
            {
                "color": "smokingblack matt"
            },
            {
                "color": "blauw matt"
            },
            {
                "color": "blauw matt"
            },
            {
                "color": "blauw matt"
            }
        ]
    }
}

Into this structure:

"uniqueConfig": {
   "color": {
        "smokingblack matt": null,
        "blue matt": null,
    }
}

You'll need to select the setting "Chain multiple entity transformers".

In order to achieve the obtained result, you'll need the following Transformers being chained:

Data, transform data using mappers and conditions
1. Move using a pattern
  1. [Pattern] uniqueConfig.color.config
  2. [Replacement] uniqueConfig.color
Node, transform nodes
1. [Accessor] Pattern accessor
  1. [Pattern] uniqueConfig.color.*
2. [NodeTransformers] List mapper
  1. [Key accessor]
  2. [Mappers] List: Flip keys and values
3. [Value Mapper]
  1. [Key accessor]
  2. [Mappers] Standard
    1. [From] String color
    2. [To] null
Data, transform data using mappers and conditions
1. Move using a pattern
  1. [Pattern] uniqueConfig.color.*.*
  2. [Replacement] temp.color.$2
Data, transform data using mappers and conditions
1. [Transformers] Move using a pattern
  1. [Pattern] temp.color.*
  2. [Replacement] result.uniqueConfig.color.$1