[GitHub] rob05c commented on issue #2124: Add TO Go GET deliveryservices routes

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rob05c commented on issue #2124: Add TO Go GET deliveryservices routes
URL: https://github.com/apache/incubator-trafficcontrol/pull/2124#issuecomment-380616330
 
 
   @DylanVolz What do you think of this versioning scheme?
   
   The highlights are: 
   
   Structs are versioned via anonymous members:
   ```type DeliveryServiceNullableV13 struct {
   	DeliveryServiceNullableV12
   	DeepCachingType   *DeepCachingType `json:"deepCachingType" db:"deep_caching_type"`
   ```
   
   There's a `GetRefType` for each different version:
   ```func GetRefTypeV12() *TODeliveryServiceV12 {
   	return &refTypeV12
   }
   
   {1.3, http.MethodGet, `deliveryservices/?(\.json)?$`, api.ReadHandler(deliveryservice.GetRefTypeV13()...
   ```
   (This still isn't necessary for routes that don't change, e.g. `divisions` can still only have `{1.2, http.MethodGet, `divisions/?(\.json)?$`, api.ReadHandler(deliveryservice.GetRefType()...` [which implicitly serves `1.3`])
   
   And functions on each API alias that don't change can be reused:
   ```func (ds *TODeliveryServiceV13) GetType() string {
   	v12 := TODeliveryServiceV12(ds.DeliveryServiceNullableV12)
   	return v12.GetType()
   }```

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