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. I have used this datasource to gather data from the cluster and was encountering an error related to this datasource:. 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. I believe it is necessary to modify the examples in the documentation to reflect this.

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:.

References No response Would you like to implement a fix?

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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. Although many of these names use dot-separated paths that resemble attribute notation for elements of object values, they are not implemented as real objects. Any named value that does not match another pattern listed below will be interpreted by Terraform as a reference to a managed resource. For more information about how to use resource references, see references to resource attributes below. If the variable has a type constraint type argument as part of its declaration, Terraform will automatically convert the caller's given value to conform to the type constraint.

Terraform cant access attributes on a list of objects.

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.

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The following is an example usage of the index function to find the index of a value in a simple list of numbers:. I believe it is necessary to modify the examples in the documentation to reflect this. With 0. Hi DustinChaloupka. Already on GitHub? We use cookies to improve your browsing experience. Jump to bottom. Terraform expressions support many built-in functions to help writing the expression code needed for a solutions infrastructure definition. I'm going to guess that this is because schema types are not necessarily easily mappable to an ast version or it is not known that that is what it should map to? Sign in to your account. 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. Skip to content. Example of the error: data. You signed out in another tab or window. Dismiss alert.

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.

If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further. Reload to refresh your session. 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. New issue. 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. The text was updated successfully, but these errors were encountered:. Terraform provides a greater ability to define Infrastructure as Code IaC through its support of Expressions. Or would you prefer a separate tracking issue? The following is an example usage of the index function to find the index of a value in a simple list of string values:. If this would be your first contribution, please review the contribution guide. 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. Hi DustinChaloupka Apologies for the error here. 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.