# Datasource ## *class* Datasource An interface for working with workflow datasources on Redivis. ## Constructors
MethodDescription
redivis$datasource(name)Create a reference to a datasource. Can only be called if a default workflow is set.
Workflow$datasource(name)Create a reference to a Datasource within a specific workflow.
Workflow$list_datasources([max_results])Returns a list of Datasources within a workflow
## Examples ```r username <- "imathews" workflow_name <- "example_workflow_climate_analysis:x7kh" dataset_name <- "ghcn_daily_weather_data" workflow <- redivis$workflow(f"{username}.{workflow_name}") datasource <- workflow$datasource(dataset_name) datasource$update(version="v2.0") ``` ## Attributes | **`workflow`** | A reference to the [Workflow](https://docs.redivis.com/api/client-libraries/redivis-r/reference/workflow) instance that this datasource belongs to. | | ---------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **`properties`** | A named list containing the [API resource representation of the datasource](https://docs.redivis.com/api/resource-definitions/datasource). This will only be populated after certain methods are called, particularly the `get` method, and will otherwise be `None`. | ## Methods
MethodDescription
datasource$create()Create a new datasource in a workflow
datasource$get()Fetches the datasource, after which datasource.properties will contain a dict with entries corresponding to the properties on the datasource resource definition. Will raise an error if the datasource does not exist.
datasource$exists()Check whether the datasource exists.
datasource$source_dataset()Returns a reference to this datasource's source dataset.
datasource$source_workflow()Returns a reference to this datasource's source workflow.
datasource$update([*, ...])Update the datasource to reference a new dataset, workflow, or version thereof.