Add method for retrieving triadic closures
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@ -193,6 +193,25 @@ class Account < ApplicationRecord
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nil
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nil
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end
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end
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def triadic_closures(account, limit = 5)
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sql = <<SQL
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WITH first_degree AS (
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SELECT target_account_id
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FROM follows
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WHERE account_id = ?
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)
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SELECT accounts.*
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FROM follows
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INNER JOIN accounts ON follows.target_account_id = accounts.id
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WHERE account_id IN (SELECT * FROM first_degree) AND target_account_id NOT IN (SELECT * FROM first_degree) AND target_account_id <> ?
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GROUP BY target_account_id, accounts.id
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ORDER BY count(account_id) DESC
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LIMIT ?
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SQL
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Account.find_by_sql([sql, account.id, account.id, limit])
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end
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def following_map(target_account_ids, account_id)
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def following_map(target_account_ids, account_id)
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follow_mapping(Follow.where(target_account_id: target_account_ids, account_id: account_id), :target_account_id)
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follow_mapping(Follow.where(target_account_id: target_account_ids, account_id: account_id), :target_account_id)
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end
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end
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