I am using Spring , JPA, Hibernate, Postgresql. I can upload/insert a file to the database. But I got the error when tried to access the file.
I have been following documents on how to move from Rails 3 to 3.1 and make it work on Heroku.I used the manual upgrade technique given here: http://webtempest.com/upgrade-rails-3-to-3-1/
I have the following from开发者_开发技巧 a Microsoft SQL Server database for date/time value: 0x00009CEF00A25634
There is an easy way to set hibernate to use different primary key ids for each table wi开发者_高级运维th postgres?
How do I retrieve a set of records, ordered by count in Arel? I have a model which tracks how many views a product get. I want to find the X most frequently viewed products over the last Y days.
I just deployed a simple Ruby on Rails (3.0.10) application to Heroku. There is a line of code create a new User object like this.
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Is there a good or standard SQL method of asserting that a join does not duplicate any rows (produces 0 or 1 copies of the source table row)?Assert as in causes the query to fail or otherwise indicate
I\'m designing a software that will use tags to identify posts similar to StackOverflow, but with some differences.
I got two identical servers, in both is installed postgresql server version 9.0.4 with the same configuration. If I launch a .sql file that performs about 5k inserts, on the first one it takes a coupl
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