This fixes #5329, which occurred when using MigrationHelpers on a
table that Postgres estimated to be non-empty when it was actually
empty.
th-downstream
aschmitz 7 years ago committed by Eugen Rochko
parent 75e036b493
commit 93e3eaf95d

@ -335,7 +335,10 @@ module Mastodon
start_arel = table.project(table[:id]).order(table[:id].asc).take(1) start_arel = table.project(table[:id]).order(table[:id].asc).take(1)
start_arel = yield table, start_arel if block_given? start_arel = yield table, start_arel if block_given?
start_id = exec_query(start_arel.to_sql).to_hash.first['id'].to_i first_row = exec_query(start_arel.to_sql).to_hash.first
# In case there are no rows but we didn't catch it in the estimated size:
return unless first_row
start_id = first_row['id'].to_i
say "Migrating #{table_name}.#{column} (~#{total.to_i} rows)" say "Migrating #{table_name}.#{column} (~#{total.to_i} rows)"

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