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.

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.

Labels documentation Introduces or discusses updates to documentation. DustinChaloupka commented Aug 3, The following is a simple example of this that retrieves a specific resource and then sets an output variable to the value of the id attribute of the object:.

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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. 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.

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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? To close things off, the following are several examples of retrieving elements from lists using the previous index function code examples of looking up the element index values:. Sorry, something went wrong. Sign up for free to subscribe to this conversation on GitHub. 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:. The following is an example usage of the index function to find the index of a value in a simple list of numbers:. The following is a simple example of this that retrieves a specific resource and then sets an output variable to the value of the id attribute of the object:. Example of the error: data. He has worked with companies of all sizes from startups to large enterprises. Continue reading. The later method of list value lookup can be extremely useful when you need to get an object reference from a list of objects managed by a Terraform Provider. Hi DustinChaloupka.

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.

Skip to content. 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. Dismiss alert. The following is an expanded example of the previous example of a splat expression that uses the for expression instead to help better understand how this works:. Basic use of index Function The Terraform index function can be used to lookup the index location of a value in a list. I have been able to recreate this, we are currently looking into it now to see what we can do. Already on GitHub? There are also times when the list may contain objects that have their own attributes. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Terraform provides a greater ability to define Infrastructure as Code IaC through its support of Expressions. You signed out in another tab or window. Labels documentation Introduces or discusses updates to documentation. He has a passion for technology and sharing what he learns with others to help enable them to learn faster and be more productive. New issue.