Overview
Loop allows you to repeat a set of steps based on different criteria.
There are primarily two categories of loops:
While Loop: This type of loop repeats the set of actions as long as a specified condition remains true. Once the condition becomes false, the loop terminates automatically.
For example, you can retrieve the data from a CSV file while the number of records has reached a certain limit, such as not more than 100 records.
For Loop: A for loop iterates over a list and executes a set of actions for each element within that list. The loop concludes once all elements have been processed.
For instance, a for loop could be used to extract data from each record in a CSV file.
Use Case
Let's look at an example where we will download a list of image URLs individually and upload them to our Amazon S3 server.
First, we have our list of image URLs and then pass it to Loop using “
for loop” for every URL present in the list..png&w=1080&q=75)
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Then, we use Files by UnifyApps to download the image files one after the other from their URLs and create a file object out of them.
Finally, we pass it to the Amazon S3 node, allowing us to upload the images to our server.
For Loop
This action allows users to execute repetitive tasks by iterating through each item in a list and performing specified actions on each of them in the sequence.
Users can choose to execute a single item at a time or process items in batches.
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Note
When batch execution is selected, users must specify the batch size, with a maximum limit of 100 items per batch.
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| Input Fields | Description |
List Source | A data structure that holds a collection of items. |
Repeat Mode | Type of For loop execution: single item or in batches. |
While Loop
This action allows users to execute a logic block if a specified condition remains true.
Users can apply conditions through the input pane and can add multiple conditions.
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| Input Field | Description |
Condition | Logical expression that evaluates to True or False. |
Add Condition | Add multiple conditions. |
Add Condition Group | Conditions can be grouped with AND or OR. |
Note
We can create hierarchies of loops by nesting them one after other to handle diverse automation scenarios effectively.
Combine Loops
You can combine While and For each Loop in the same automation.
For example, a recipe can contain a For loop inside a While loop. Following example supports the above use case:
REPEAT search for contacts using SOQL query in Salesforce WHILE pages of search results remain.
FOR EACH record in a page of search results, retrieve contact details.
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