Terraform cant access attributes on a list of objects.

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. After some digging I found that the above PR appeared to change what types of elements could be accessed from lists, however, there was no reference in the PR or the changelog about the change in the element function or it appears any of the functions that take a list type only working with flat lists.

Terraform cant access attributes on a list of objects.

Terraform provides a greater ability to define Infrastructure as Code IaC through its support of Expressions. Expressions are lines of code that define configuration and attributes on resources in the Terraform HCL code as the Terraform code is executed with the terraform plan command. This enables a rich ability to dynamically configure resources based on passed input variables to the Terraform Project , or even via looking up other resources managed by the same Terraform Project. There is a huge variety to the different code expressions that can be written in Terraform to suit the requirements of different Infrastructure as Code projects. Terraform expressions support many built-in functions to help writing the expression code needed for a solutions infrastructure definition. When using a Terraform list type to define an Array of value or objects, it may be necessary at times to lookup those values programmatically. The Terraform index function can be used to lookup the index location of a value in a list. The function accepts an argument that is a reference to the list to search, and an argument that is the value to lookup the index for within the list. The following is an example usage of the index function to find the index of a value in a simple list of string values:. The previous example shows how simple it is to use the index function to retrieve the index of a value within a list of strings aka list string. This can be used exactly the same way to lookup the index of values in a list of numbers aka list number too. The following is an example usage of the index function to find the index of a value in a simple list of numbers:. There are also times when the list may contain objects that have their own attributes. To use the index function on a list of objects list object to find the index of an object in the list by looking up the value of an attribute on the object is performed with the help of a splat expression that that converts the list object to a list of the values needed for the lookup. The following is an example of using a splat lookup on a list of objects to lookup the index of the object in the list with the name attribute set to the value being looked up:.

I have found that this is not specified in the documentation, but to access the properties of the data object, it is necessary to specify that it is within a list. Already have an account?

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Hands-on: Try the Create Dynamic Expressions tutorial. Terraform makes several kinds of named values available. Each of these names is an expression that references the associated value. You can use them as standalone expressions, or combine them with other expressions to compute new values. The main kinds of named values available in Terraform are:. The sections below explain each kind of named value in detail.

Terraform cant access attributes on a list of objects.

Terraform provides a greater ability to define Infrastructure as Code IaC through its support of Expressions. Expressions are lines of code that define configuration and attributes on resources in the Terraform HCL code as the Terraform code is executed with the terraform plan command. This enables a rich ability to dynamically configure resources based on passed input variables to the Terraform Project , or even via looking up other resources managed by the same Terraform Project. There is a huge variety to the different code expressions that can be written in Terraform to suit the requirements of different Infrastructure as Code projects. Terraform expressions support many built-in functions to help writing the expression code needed for a solutions infrastructure definition.

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I am also seeing this issue described in comment All reactions. If this would be your first contribution, please review the contribution guide. Was this intended? Copy link. Type your email… Subscribe. There are also times when the list may contain objects that have their own attributes. Dismiss alert. Based on the documentation and schema, I would not expect this resource to return a list of EKS cluster resources; in fact, since the lookup is done by name , it should be impossible for more than one cluster to be returned. Notifications Fork 9. Or would you prefer a separate tracking issue? Thank you! Have a question about this project?

For quite some time, I've been waiting for a particular feature to exit beta and this is the optional object type attribute. The Optional Object type attribute, was in beta for quite some time since Terraform 0. When you are building a generic module and you want to offer a lot of possibilities for the people that are going to use it, you will use objects.

The previous examples show how to use the index function to look up and retrieve elements from a list by their value, including by the value of an attribute on objects within a list. This was referenced Sep 6, Note that "this isn't currently supported" is fine since it seems like the previous behavior was not explicitly supported at which point this could be a feature rather than a bug. All reactions. This helps our maintainers find and focus on the active issues. After some digging I found that the above PR appeared to change what types of elements could be accessed from lists, however, there was no reference in the PR or the changelog about the change in the element function or it appears any of the functions that take a list type only working with flat lists. Terraform provides a greater ability to define Infrastructure as Code IaC through its support of Expressions. He has worked with companies of all sizes from startups to large enterprises. Notifications Fork 9. The new square bracket indexing syntax does not have this limitation, so that's the way you can properly express this scenario in your config:. Already on GitHub? Continue reading. Type your email….