relationships

Rails3 + Typus: display habtm relationship as checkboxes

别来无恙 提交于 2019-12-06 14:26:59
I'm managing my admin backend with Typus I want to add a field with a checkbox for each category. I used this code: Post: fields: default: name, description, user, categories list: name, description, user, categories form: name, description, user, categories relationships: categories But the result is a textfield with a [] inside: how do I solve this? Is there a native way or must I override the field template? To show the the checkbox for the fields you can use the existing template of the Typus Post: fields: default: name, description, user, categories list: name, description, user,

hasMany reduced to hasOne in CakePHP

…衆ロ難τιáo~ 提交于 2019-12-06 04:29:14
Basically I have following models in CakePHP: User(id, username) Photo(id, user_id, path) I have set up following relation: User hasMany Photo. On one screen, I would like to list users, and show random photo next to each user. I tried setting up following relation: User hasOne SamplePhoto (where SamplePhoto is just Photo model) but when user has two photos for instance, he is listed twice on the list. basically my question is: can you reduce hasMany relation to hasOne, without adding any fields to table schema presented above? I would like to tell cake - find the first record in the Photo

Neo4J - Storing into relationship vs nodes

大兔子大兔子 提交于 2019-12-05 14:01:46
I was wondering if there are any advantages or disadvantages in storing data into relationships or nodes. For example, if I were to store comments related to a discussion into the DB, should I store the comment data in a "comment" relationship or a "comment" node that is related to the discussion through a separate relationship. The correct data model depends on the types of queries you need to make. You should figure out what your queries are, and then determine a data model that meets these criteria: It allows you to answer all your queries, It allows your queries to finish sufficiently

Querying Relationship Existence using multiple MySQL database connections in Laravel 5.2

自闭症网瘾萝莉.ら 提交于 2019-12-05 06:06:19
I am dealing with the following situation: I have two models, an Employee with id and name fields and a Telephone with id , employee_id and flag fields. There is also an one-to-many relationship between these two models, that is an employee may have many telephones and a telephone may belong to a single employee. class Employee extends Model { public function telephones() { return $this->hasMany(Telephone::class); } } class Telephone extends Model { public function employee() { return $this->belongsTo(Employee::class); } } The Employee model references a table employees that exists in database

In Laravel, how to set up a relationship for a “likes” table? Also, how to include that information in a query?

别等时光非礼了梦想. 提交于 2019-12-04 21:26:47
I have three tables: users , ideas , and ideas_likes . The ideas_likes table looks like: ideas_likes ------------ id primary key user_id foreign key idea_id foreign key liked boolean There's already a one-to-many relationship set up between users and ideas. It looks something like this: class User extends Ardent implements UserInterface, RemindableInterface { use UserTrait, RemindableTrait; protected $table = 'users'; public function ideas() { return $this->hasMany('Idea'); } } Similarly, the idea model looks like this: class Idea extends Ardent { protected $table = 'ideas'; public function

Polymorphic habtm relationships with Rails/ActiveRecord

生来就可爱ヽ(ⅴ<●) 提交于 2019-12-04 14:41:06
问题 How would I go about creating a polymorphic has_and_belongs_to_many relationship with Rails/ActiveRecord? Most of the examples I see involve creating a belongs_to relationship which limits my polymorphic-side to being related to only one parent: Table: Task Table: Tasks_Targets Table: CustomerStore Table: SoftwareSystem Both CustomerStore and SoftwareSystem would be of type "Targetable" in this circumstance. From what I understand, if I implement the polymorphic relationship as most examples

Alternative to multi-valued fields in MS Access

♀尐吖头ヾ 提交于 2019-12-04 12:29:59
问题 Related question: Multivalued Fields a Good Idea? I know that multi-valued fields are similar to many-to-many relationship. What is the best way to replace multi-valued fields in an MS Access application? I have an application that has multi-valued fields. I am not sure how exactly to do away with those and implement exactly same logic in the form of fields that are single-valued? What would be the implementation in terms of table-relationships when I want to move a multi-valued relationship

How to model Friendship relationships

房东的猫 提交于 2019-12-03 21:51:17
问题 I have been trying to figure out how to do this, and even with looking at other examples, I can't get it figured out, so maybe I can get some personalized help. I've got two tables, users_status and friendships . In the users_status table I have a field userid , and several others. In the friendships table, I have the fields request_to , request_from , and friendship_status . Basically what I want to do is get all of the status posts by the current user AND those who are friends of the

JSON to Core Data with Relationships

孤街浪徒 提交于 2019-12-03 10:14:55
问题 Following Ray Wenderlich's new tutorial I was able to get JSON data and store it into Core data. I am having a really hard time understanding how to do this with relationships in Core Data though. Here is my Data Model: Here is my JSON: { "results": [ { "name": "Trivia 1", "objectId": "1000", "createdAt": "2012-08-31 18:02:52.249 +0000", "updatedAt": "2012-08-31 18:02:52.249 +0000", "questions": [ { "text": "Question 1" }, { "text": "Question 2" }, { "text": "Question 3" } ] } ] } And finally

Rails accepts_nested_attributes_for child doesn't have parent set when validating

↘锁芯ラ 提交于 2019-12-03 09:36:57
问题 I'm trying to access my parent model in my child model when validating. I found something about an inverse property on the has_one, but my Rails 2.3.5 doesn't recognize it, so it must have never made it into the release. I'm not sure if it's exactly what I need though. I want to validate the child conditionally based on parent attributes. My Parent model has already been created. If the child hasn't been created when I update_attributes on the parent, then it doesn't have access to the parent