I have an array of individual PDF pages. I am trying to merge them into one PDF using the 0codekit pdf-merge module. pdf-merge module wants an array of objects, where each object has a type (which needs to be “buffer”) and the data.
Clearly I need to use the “map” switch next to the “Files” input field in the pdf-merge module, but what do I put in the box? How do I map the array, ensuring that the source type of “buffer” is passed with each item.
This works perfectly to do the first two pages:
But what do I put in here to do all pages in the array?
Welcome to the Make community!
See second section below:
Combining Bundles Using Aggregators
Every result (item/record) from trigger/iterator/list/search/match modules will output a bundle. This can result in multiple bundles, which then trigger multiple operations in future modules (one operation per bundle). To “combine” multiple bundles into a single variable, you’ll need to use an aggregator of some sort.
Aggregators are modules that accumulate multiple bundles into one single bundle. An example of a commonly-used aggregator module is the Array aggregator module. The next popular aggregator is the Text Aggregator which is very flexible and can apply to many use-cases like building of JSON, CSV, HTML.
You can find out more about the other types of aggregator modules here:
Mapping a Specific Structure Into a Complex Field
The Array Aggregator module is very powerful because it allows you to build a complex array of collections for a later module’s field to map multiple items (collections) to it.
This is done using the “Target structure type” field in an Array Aggregator module.
Here is an example:
As you can see, the “Map” toggle on complex fields are used when you have an array. You can easily build an array variable to map to a future module’s field, by using an Array Aggregator module and select the “Target Structure Type” as the future module’s field you have mapped the array into.
Example
Here is an example of how your scenario could look:
This is just an example. Your final solution may or may not look like this depending on your requirements and actual input data.
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Investing some effort into the Make Academy will save you lots of time and frustration using Make.
