doctrine-dbal | 易学教程

Incorrect mapping of mysql tinyint(2) as boolean with doctrine

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问题 I reverse engineered my database with symfony2 and doctrine with commands : php app/console doctrine:mapping:convert php app/console doctrine:mapping:import php app/console doctrine:generate:entities But my field was mapped as boolean instead of tinyint(2). Why it is mapping as boolean? 回答1: tinyint (regardless of length) is mapped to type boolean in the MySQL DBAL platform. Also, consider that the entity generator is not a reliable tool: it was just meant to give you some help in getting

What is the difference between Database Abstraction Layer & Data Access Layer?

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I am actually stuck in 3-tier structure. I surfed the internet and found two terminologies "Database Abstraction Layer" & "Data Access Layer". What are the differences between the two? Lotus Notes My understanding is that a data access layer does not actually abstract the database, but rather makes database operations and query building easier. For example, data access layers usually have APIs very similar to SQL syntax that still require knowledge of the database's structure in order to write: $Users->select('name,email,datejoined')->where('rank > 0')->limit(10); Data abstraction layers are

What is the difference between Database Abstraction Layer & Data Access Layer?

阅读更多关于 What is the difference between Database Abstraction Layer & Data Access Layer?

问题 I am actually stuck in 3-tier structure. I surfed the internet and found two terminologies "Database Abstraction Layer" & "Data Access Layer". What are the differences between the two? 回答1: My understanding is that a data access layer does not actually abstract the database, but rather makes database operations and query building easier. For example, data access layers usually have APIs very similar to SQL syntax that still require knowledge of the database's structure in order to write: