rails-postgresql

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how to improve the insertion speed in postgresql

INSERT INTO contacts_lists (contact_id, list_id) SELECT contact_id, 110689 AS list_id FROM plain_contacts[详细]

2023-03-23 17:59 分类：问答
PostgreSQL DISTINCT problem: works locally but not on server

I\'ve come across a vexing problem with a PostgreSQL query. This works in my local development environment:[详细]

2023-03-22 13:11 分类：问答
How to find posts with multiple tags

I have a very simple tag model on Rails with postgresql: class Tag < ActiveRecord::Base has_many :taggings[详细]

2023-03-22 04:22 分类：问答
Rails 3.1.0.rc4 + Postgres - cannot read from or write to database after reboot

I\'ve just started to write an application using the latest version of Rails and PostgreSQL. I created the database, added required gem, configured database.yml file and started with two models - User[详细]

2023-03-20 02:30 分类：问答
SQL Statement for first row in a "has_many"-association

I\'m trying to access only the first lines of associated tables. What is th开发者_如何学Pythone best and fastest way to do this? (Ideally an SQL statement)[详细]

2023-03-15 13:35 分类：问答
how to prevent alter table/trigger enable during fixture load

I\'m writing a rails application that reads data from another (legacy, cause it hasn\'t got any unit tests...) systems\' tables.It does not have any permissions on those tables (eventually, it will em[详细]

2023-03-13 08:28 分类：问答
Rails doesn't convert timezone (PostgreSQL)

I have a problem with timezones and a postgresql db (Rails 3.0.4, PostgreSQL 9.0). I\'m using a custom scope, in which I append some conditions, do joins etc.pp.[详细]

2023-02-27 05:14 分类：问答
Django: optimizing many to many query

I have Post and Tag models: class Tag(models.Model): \"\"\" Tag for blog entry \"\"\" title= models.CharField(max_length=255, unique=True)[详细]

2023-02-25 13:14 分类：问答
Maintain a dialog center with dynamic content

I would have a dialog with the following $(\"#statusbox\").dialog({ autoOpen: false, bgiframe: true, modal: true,[详细]

2022-12-28 13:39 分类：问答