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Follow edges
This revision card explains Follow edges. It starts from the need that SQL joins do not become feeds. It describes FOLLOW# and FOLLOWER# adjacency items both ways. The how-to section notes patterns , then put edges , then Query FOLLOW# , then draw reverse. An example on the card is kenji Watanabe always writes the reverse edge.
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What this card says
Why do we need it?
SQL joins do not become feeds.
What is it?
FOLLOW# and FOLLOWER# adjacency items both ways.
adjacency
How to do it
Patterns → put edges → Query FOLLOW# → draw reverse.
Example
Kenji Watanabe always writes the reverse edge.