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. Was this intended? I tried to do some workarounds, but it appeared that anything that I tried to use that took a type of list did not like the fact that it was not a flat list.

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.

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Terraform is a powerful tool for managing infrastructure, but it can sometimes be difficult to use. This can make it difficult to manage complex configurations. Terraform is an open-source infrastructure as code IaC tool that allows you to manage your infrastructure declaratively. This means that you can describe your infrastructure in a configuration file, and Terraform will take care of creating and provisioning the resources that you need. Make sure that the list of objects is not empty. Make sure that the nested list of objects is not empty. Make sure that the map contains the specified key. Terraform is a popular infrastructure as code IaC tool that allows you to define and manage your infrastructure in a declarative way. Terraform uses a state file to track the current state of your infrastructure, and it uses this state file to apply changes to your infrastructure. One common problem that Terraform users encounter is that they cannot access attributes on a list of objects.

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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You signed in with another tab or window. References No response Would you like to implement a fix? I think a separate issue tracking the specific case of indexing computed lists would be a good idea, since this is legitimately a separate concern from what was originally described in this bug that element was only able to return strings. I have been able to recreate this, we are currently looking into it now to see what we can do Please bear with us Paul. All reactions. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. This helps our maintainers find and focus on the active issues. 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. Terraform expressions support many built-in functions to help writing the expression code needed for a solutions infrastructure definition. I believe it is necessary to modify the examples in the documentation to reflect this.

Terraform is a powerful tool for managing infrastructure, but it can sometimes be tricky to get the hang of. One common problem that Terraform users encounter is not being able to access attributes on a list of objects. Terraform is a tool for building, changing, and versioning infrastructure.

Reload to refresh your session. References No response Would you like to implement a fix? Labels bug core. Terraform Version 0. Flattening a list in 0. Related Articles. You signed out in another tab or window. 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. Volunteering to Work on This Issue If you are interested in working on this issue, please leave a comment. This happens to work if your list attributes happen to only have one element, but it causes some very unexpected behavior in most other cases. Notifications Fork 8. Sorry, something went wrong. The scenario that does not work, however, is when the resource has not yet been created and the list attribute has not been explicitly defined:.