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December 25, 2018 08:09
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Use case to update product dimensions with dependencies injected through the type constructor
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type UpdateProductDimensions(dataStore: DataStore)= | |
//Other private methods removed for brevity | |
let updateDimensions(productId, height, length, weight, width)= | |
dataStore.getProduct productId | |
|> Result.map(fun p-> p.updateDimensions(height, length, weight, width)) | |
|> Result.map dataStore.updateProduct | |
member this.update (productId, (height,length,weight,width)) = | |
dataStore.productExists productId | |
|> Result.bind(function | |
| Some p -> updateDimensions(p, height, length, weight, width) | |
| None -> Error(new exn (sprintf "Product %i does not exist." productId))) |
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