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POResue from Mysql unique index duplicate entry
 

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  1. POResue from Mysql unique index duplicate entry
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    <p>I am trying to fix a double request problem: when browser spawn two or more identical requests to server and they got processed on different app servers.</p> <p>In this case one of two requests hits:</p> <pre><code>Mysql::Error: Duplicate entry '...' for key 'index_purchases_on_site_id_and_order_number_and_email </code></pre> <p>There is rescue code afterwards that selects existing record instead that uses the same parameters as insert request:</p> <pre><code>select * from purchases where site_id = ? and order_number = ? and email = ? </code></pre> <p>But it doesn't find anything in database.</p> <p>A fragment from DB query log:</p> <pre><code> SQL (1.3ms) BEGIN ...... Purchase Create (0.0ms) Mysql::Error: Duplicate entry '1887-100264587-9z1CIIDsH2a21+AEEH2OR9LsndO3oIS4D4Am1U5XJ04= ' for key 'index_purchases_on_site_id_and_order_number_and_email': INSERT INTO `purchases` (`order_date`, `referrer`, `created_at`, `updated_at`, `encrypted_email`, `visitor_id`, `order_number`, `coupon_code`, `subtotal`, `customer_id`, `site_id`, `ip_address`) VALUES('2013-01-14 20:57:47', 'https://www.bonobos.com/b/checkout', '2013-01-14 20:57:47', '2013-01-14 20:57:47', '9z1CIIDsH2a21+AEEH2OR9LsndO3oIS4D4Am1U5XJ04=\n', 15813843, '100264587', '', 218.0, NULL, 1887, '12.106.186.6') Purchase Load (0.5ms) SELECT * FROM `purchases` WHERE (order_number = '100264587' AND site_id = 1887 AND encrypted_email = '9z1CIIDsH2a21+AEEH2OR9LsndO3oIS4D4Am1U5XJ04=\n') LIMIT 1 SQL (18.0ms) ROLLBACK </code></pre> <p>How is this possible? </p>
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    1. PTQuestion
    1. USBogdan Gusiev
    1. USBogdan Gusiev
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. COdo you use transactions?
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      1. POResue from Mysql unique index duplicate entry
      1. USLuca Rainone
    2. COYes, I am using them. Transaction is important for the app logic. Can still do it without removing transaction?
      singulars
      1. POResue from Mysql unique index duplicate entry
      1. USBogdan Gusiev
    3. COThe Schema and DML commands that result in this error would be helpful.
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      1. POResue from Mysql unique index duplicate entry
      1. USeggyal
 

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