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Add public docs for entity aliasing #1951

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merged 2 commits into from
Nov 4, 2021

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codyjlin
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Signed-off-by: Cody Lin [email protected]

What this PR does / why we need it:
This adds public documentation for entity aliasing functionality to the concepts/feature-view page. (Also, this is my first time contributing the public docs - not sure what the process is / if it's ok to do it through a PR like this.)

Which issue(s) this PR fixes:

Fixes #1762

Does this PR introduce a user-facing change?:

NONE

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Hi @codyjlin. Thanks for your PR.

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codecov-commenter commented Oct 15, 2021

Codecov Report

Merging #1951 (389b8b0) into master (704c247) will decrease coverage by 22.45%.
The diff coverage is n/a.

Impacted file tree graph

@@             Coverage Diff             @@
##           master    #1951       +/-   ##
===========================================
- Coverage   81.97%   59.51%   -22.46%     
===========================================
  Files          99       99               
  Lines        7922     7922               
===========================================
- Hits         6494     4715     -1779     
- Misses       1428     3207     +1779     
Flag Coverage Δ
integrationtests ?
unittests 59.51% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files Coverage Δ
.../integration/online_store/test_universal_online.py 14.17% <0.00%> (-85.08%) ⬇️
.../integration/online_store/test_online_retrieval.py 17.39% <0.00%> (-82.61%) ⬇️
sdk/python/tests/utils/online_read_write_test.py 18.18% <0.00%> (-81.82%) ⬇️
...fline_store/test_universal_historical_retrieval.py 19.41% <0.00%> (-80.00%) ⬇️
...gration/registration/test_feature_service_apply.py 31.25% <0.00%> (-68.75%) ⬇️
sdk/python/tests/data/data_creator.py 34.78% <0.00%> (-65.22%) ⬇️
...s/integration/registration/test_universal_types.py 36.73% <0.00%> (-63.27%) ⬇️
sdk/python/feast/infra/online_stores/datastore.py 30.32% <0.00%> (-63.12%) ⬇️
sdk/python/feast/infra/online_stores/redis.py 30.35% <0.00%> (-62.50%) ⬇️
sdk/python/feast/infra/online_stores/dynamodb.py 30.37% <0.00%> (-60.76%) ⬇️
... and 47 more

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@@ -53,6 +53,50 @@ global_stats_fv = FeatureView(
{% endtab %}
{% endtabs %}

## Entity aliasing

"Entity aliases" can be specified to join `entity_df` columns that do not match the column names in the feature data table. Another use case involves entities that are a subclass of a more general entity. For example, "spammer" and "reporter" could be aliases of a "user" entity, and "origin" and "destination" could be aliases of a "location" entity as shown below. It is suggested that you dynamically specify the new FeatureView name using `.with_name` and `join_key_map` override using `.with_join_key_map` instead of register each new copy.
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This intro is a bit cryptic

  • What is "the feature data table"?
  • What is "entity_df"? What about "entity dataframe"?
  • We seem to be mixing what entity aliasing is, what it is used for, and how to use it, all in a single paragraph.

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Got it, let me know if the updated version is better.

@codyjlin codyjlin requested a review from woop October 19, 2021 22:24
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/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: adchia, codyjlin

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@adchia adchia merged commit 38cf9cb into feast-dev:master Nov 4, 2021
@codyjlin codyjlin deleted the entity-aliasing-docs branch November 4, 2021 23:18
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Shadow entities mapped properly to real entity with entity aliasing
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