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activerecord - Rails: Creating models from existing tables?
    I have tables already created from a different project. Their names are formatted like aaa_bbb_ccc_ddd (all non ... schema from existing tables? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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activerecord - Yii - multiple records in one form submission
    Does anyone know how to add multiple records using just one form in Yii? All the records belong to the same ... same format. Many thanks, Nick See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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activerecord - Rails polymorphic has_many :through
    I'm pulling some data from an external API and would like to cache the results locally. I have a class ... insight you can provide to me! See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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activerecord - using UUID as primary key in rails and polymorph relationships
    I'm creating a rails 3 application that will be decentralized and I need to use UUID as primary key for my tables ... don't need that with UUID. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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513 views
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activerecord - How do I avoid multiple queries with :include in Rails?
    If I do this post = Post.find_by_id(post_id, :include => :comments) two queries are performed (one for post ... the comments via post.comments? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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579 views
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activerecord - Rails Model Inheritance
    If I have a User and I want to make different types of users, say just normal users with only an email and ... Users with just an added field? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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500 views
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activerecord - How to use Rails 4 strong parameters with has_many :through association?
    I'm having trouble getting a has_many :through association working with Rails 4's strong parameters. ... .com/leemcalilly/36be318c677bad75b211 See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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695 views
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activerecord - Model.reset_column_information does not reload columns in rails migration
    I'm using Rails 3.2 and have a migration that contains the code: add_column :users, :gift_aid, :integer, : ... one - anyone got any ideas See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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495 views
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activerecord - How to delete all data from all tables in Rails?
    I can do Post.delete_all to delete all my posts, but what if I want to delete all posts, comments, ... models and run the delete_all method? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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585 views
1 answer
activerecord - Rails idiom to avoid duplicates in has_many :through
    I have a standard many-to-many relationship between users and roles in my Rails app: class User < ActiveRecord::Base ... 1, name: "1">] See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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534 views
1 answer
activerecord - Update the value of a field in database by 1 using codeigniter
    I want to implement a SQL statement using codeigniter active record. UPDATE tags SET usage = usage+1 ... Codeigniter active records? Regards See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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538 views
1 answer
activerecord - Rails: Has and belongs to many (HABTM) -- create association without creating other records
    Spent all day on Google, but can't find an answer. : I have a HABTM relationship between Users and Core_Values. ... ONLY. Thanks for your help! See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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350 views
1 answer
activerecord - Add a clause to a MySQL statement without quotes using CodeIgniter's Active Record functions
    I wanted to update a row using active records in codeigniter, and I only want to increment a field value ( ... do it using active records? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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582 views
1 answer
activerecord - Cloning a record in rails, is it possible to clone associations and deep copy?
    I'm .clone -ing a record in rails... new_blerg = Blerg.find(1).clone This record has loads and loads of ... with all of those associations too? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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437 views
1 answer
activerecord - Deprecation warning when using has_many :through :uniq in Rails 4
    Rails 4 has introduced a deprecation warning when using :uniq => true with has_many :through. For example: ... the above has_many declaration? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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665 views
1 answer
activerecord - How to implement a unique index on two columns in rails
    I have a table and I'm trying to add a unique index on two columns. Those columns are also indexed. So my ... ["content_id"], :unique => true See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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492 views
1 answer
activerecord - When do I use save!, create! and update_attributes! in Rails?
    I'm trying to figure out when to use the bang! versions for saving and updating records? I've read and heard ... the end. Thanks for your time. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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297 views
1 answer
activerecord - Use rails nested model to *create* outer object and simultaneously *edit* existing nested object?
    Using Rails 2.3.8 Goal is to create a Blogger while simultaneously updating the nested User model (in case info ... there must be a solution. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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390 views
1 answer
activerecord - Can you do greater than comparison on a date in a Rails 3 search?
    I have this search in Rails 3: Note.where(:user_id => current_user.id, :notetype => p[:note_type], :date => ... I do this? Thanks for reading. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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513 views
1 answer
activerecord - Rails database defaults and model validation for boolean fields
    In a Rails model I have an attribute is_subscriber, when I constructed a db migration to add this column to the ... subscriber can't be blank): See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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433 views
1 answer
activerecord - Rails best way to get previous and next active record object
    I need to get the previous and next active record objects with Rails. I did it, but don't know if it's ... or something like a priority field. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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417 views
1 answer
activerecord - getting the value of the single field output using the codeigniter active record
    the following function is supposed to read the name of the given asset code from the database. but it ... Your help is highly appreciated! See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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484 views
1 answer
activerecord - Rails gem rails3-jquery-autocomplete: How do I query multiple fields
    I'm using the rails3-jquery-autocomplete gem found here: http://github.com/crowdint/rails3-jquery-autocomplete ... of first_name and last_name? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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487 views
1 answer
activerecord - How to list of all the tables defined for the database when using active record?
    How do I get a list of all the tables defined for the database when using active record? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
752 views
1 answer
activerecord - How to show SQL queries run in the Rails console?
    When I run queries (e.g. MyModel.where(...) or record.associated_things) in the console, how can I ... more understanding of what is happening? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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491 views
1 answer
activerecord - How to use long id in Rails applications?
    How can I change the (default) type for ActiveRecord's IDs? int is not long enough, I would prefer long. I ... does one just use some decimal? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
0 votes
858 views
1 answer
activerecord - Rails create or update magic?
    I have a class called CachedObject that stores generic serialized objects indexed by a key. I want this class to ... to write my own method? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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634 views
1 answer
activerecord - how to add records to has_many :through association in rails
    class Agents << ActiveRecord::Base belongs_to :customer belongs_to :house end class Customer << ActiveRecord::Base ... has_many :through table? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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