How to Set Multiple JSON Values with jq in Bash Scripts

Discover how to effectively update multiple keys in a JSON file using the `jq` tool in Bash scripts with our step-by-step guide.
---

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Can't set different json values with different values

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Set Multiple JSON Values with jq in Bash Scripts

If you've been working with JSON files in bash scripts, you might have encountered a situation where you need to update multiple values within a JSON object. This can be particularly tricky if you don't know how to properly chain commands or if you end up overwriting your changes. In this guide, we'll explore a common problem and provide a straightforward solution using the powerful jq tool.

The Problem

[[See Video to Reveal this Text or Code Snippet]]

You want to set the value for "total" to 500, and change "project" to "MY_PROJECT". A typical approach might look something like this in a bash script:

[[See Video to Reveal this Text or Code Snippet]]

[[See Video to Reveal this Text or Code Snippet]]

You might be wondering, why is this happening?

Understanding the Issue

The Solution

To resolve this, we can chain the jq commands together in a way that allows us to update multiple keys in a single command. Here’s how you can do it more efficiently:

Using Chaining

The simplest method to achieve the result you want is to combine both updates into one jq command. You can utilize the following code:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Command

--arg: This option allows you to set variables that you can use within your jq expressions.

$totalArg and $projectKey: These are the variables that will hold the values you want to set.

Chaining: The | operator allows you to apply changes sequentially on the JSON object.

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Updating multiple keys in a JSON object can be straightforward if you use jq correctly. By combining your commands into one, you not only streamline your script but also avoid potential pitfalls like overwriting changes. Next time you find yourself needing to modify multiple values in JSON, remember this approach for a cleaner and more efficient solution.

By following the steps outlined above, you can seamlessly manage your JSON data within Bash scripts. Happy scripting!