Implement Ancestry Layer-wise feature API #605
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We need to have proper test infrastructure. The previous code doesn't work at all but passes all test checks. Now it's fixed though. |
database/models.go
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| Ancestry | ||
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| ProcessedBy Processors | ||
| Features []NamespacedFeature | ||
| // TODO(sidchen) deduplicate the Layers. |
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is this something we want to do? won't the different layers have different context?
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Well, the problem here is that Ancestry has Layers field, which contains a list of Layer, and AncestryLayer also has Layer. The information is duplicated. I just don't really know a good way to deduplicate these.
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Why not have both types be the same but leave the DetectedFeatures for each Layer empty when it isn't AncestryWithContent?
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I remember the design is that: Every struct, when returned, MUST have all fields filled to represent the whole information. Therefore, leaving DetectedFeatures empty will indicate that the Layer has NO detected features.
database/pgsql/ancestry.go
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| return awf, true, nil | ||
| // By the assumption of Ancestry Layer Index, we have the ancestry's layer | ||
| // index corresponding to the index in the array. |
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This should really be in the Session interface doc comment for FindAncestryWithContent.
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Well, this is an implementation detail for the ancestry_layer table. Here, I'm using the ancestry_index as the key to associate features to ancestry layers.
For people who implements this interface, they don't need to know what ancestry_index is. All they should do is get corresponding features for each layer in the Ancestry. They can do it in different ways, for example, query layer-wise feature directly using a single query.
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database/models.go
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| ProcessedBy Processors | ||
| Features []NamespacedFeature | ||
| // TODO(sidchen) deduplicate the Layers. | ||
| Layers []AncestryLayer |
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We should comment here about the order of the layers.
Feature extraction algorithm is changed to associate features with ancestry layer. Database is updated to keep the relationship.
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Ancestry now has the per-layer feature information instead of per-ancestry feature information.