In a DBT (Data Build Tool) project, the config-version configuration in the dbt_project.yml file is used to specify the version of the configuration file format that the project uses. This configuration is used to ensure that DBT can read and interpret the dbt_project.yml file correctly.
The config-version configuration is a required field in the dbt_project.yml file and should be set to the current version of the DBT project configuration. The current version of the configuration file format is 2.0.0, which supports new features and configurations that were not available in previous versions.
Here are some key points to keep in mind when working with config-version:
- Syntax: In the
dbt_project.ymlfile,config-versionis specified as a string that contains the version number. For example, the following configuration sets theconfig-versionto 2.0.0:
config-version: 2.0.0
- Placement: The
config-versionconfiguration should be placed at the top of thedbt_project.ymlfile, before any other configurations. - Version updates: When a new version of the configuration file format is released, it is important to update the
config-versionconfiguration to the latest version. This ensures that your project can take advantage of any new features or configurations that are available in the latest version. - Compatibility: When upgrading to a new version of the DBT project configuration file format, it is important to check that any third-party tools or plugins that you are using are compatible with the new version.
- Downgrades: In general, it is not recommended to downgrade the
config-versionto a previous version. This can cause compatibility issues with DBT and any third-party tools or plugins that you are using. - Error messages: If the
config-versionis set to an invalid version or is missing from thedbt_project.ymlfile, DBT will produce an error message indicating that the configuration file is invalid.
Without this configuration, dbt will assume your dbt_project.yml uses the version 1 syntax, which was deprecated in dbt v0.19.0.
In summary, the config-version configuration in the dbt_project.yml file is an important component of a DBT project. It ensures that DBT can read and interpret the dbt_project.yml file correctly, and supports new features and configurations that are not available in previous versions. By following the guidelines for syntax, placement, and version updates, you can ensure that your config-version configuration works as expected and improves your DBT project workflow.
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