activerecord

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How can I rank records on the index page by multiple values?

I have a table of venues in my app which are displayed on the venues index page in partials with the highest average rated venues at the top and descending:[详细]

2023-04-07 14:10 分类：问答
refactoring: swicthing from custom data access layer to Entity Framework

I am a .NET Developer and as part of a refactoring project, I have a few questions. Our software is currently using an Active Record pattern (one to one mapping between the data objects and the busin[详细]

2023-04-07 13:47 分类：问答
How to force primary key in ActiveRecord with PostgreSQL to jump start from a specific integer value?

From this: How to make a primary key start from 1000?It seems that I need to issue the SQL command: ALTER TABLE tbl AUTO_INCREMENT = 1000;[详细]

2023-04-07 11:45 分类：问答
AR Query returning a relation instead of the expected object type (model person)

Queries returnin开发者_JAVA技巧g different object types based on using limit() or first This example uses limit(1) and does not produce the expected object type:[详细]

2023-04-07 11:41 分类：问答
Why does query with AND and OR operators yield unexpected results?

I have this query but it\'s not giving me the expected results: User.all(:conditions => [\"company_id == ? AND role_id == ? OR role_id == ? OR role_id == ?\", X, 1,2,3 ])[详细]

2023-04-07 09:32 分类：问答
sum with join in active records

Hi pleas bear with me I\'m very new to mysql/active records (all previous projects have only been basic CRUD) I am trying to join two tables so I can generate a table of my invoices with a subtotal (d[详细]

2023-04-07 01:34 分类：问答
Rails many-to-many foreign key validation?

Newbie question. I would like to add a validation step to my joint table model to make sure that an object of that type cannot be created without the two tables being joined containing the rows being[详细]

2023-04-07 01:09 分类：问答
Why is my controller not ordering by what Im telling to order by?

My controller action is calling all images belonging to a specific user and Im trying to order by its position (Im using the acts_as_list gem) but when I go to the page, the images are FIRST sorted by[详细]

2023-04-06 21:06 分类：问答
codeigniter ActiveRecord where statement issue

is have this statement and i want to make it by the Active Records wayin codeigniter DELETE FROM TABLE[详细]

2023-04-06 20:35 分类：问答
How can I chain two rails Queries together elegantly?

I have the following model object: #<Insight id: 15开发者_如何学编程5, endorse_id: 15, supporter_id: 15, created_at: \"2011-09-22 02:27:50\", updated_at: \"2011-09-22 02:27:50\">[详细]

2023-04-06 19:55 分类：问答