Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>To persist a Many to Many relationship on the server, I'm hacking the <code>hasMany</code> method of the serializer to add an option <code>serialized</code> in the mapping.</p> <p>Here is the serializer (CoffeeScript) :</p> <pre><code>App.Serializer = DS.RESTSerializer.extend # redefine to make it possible to serialize a relationship by an array of ids # to enable it, a 'serialized' property should be set to 'ids' in the adapter mapping # the key in the hash will be the type of the object in the relation ship + _ids' # example : for an hasMany('App.Category'), the key will be category_ids addHasMany: (hash, record, key, relationship) -&gt; type = record.constructor name = relationship.key serializedType = @serializedType type, name if serializedType is 'ids' key = @singularize(@keyForAttributeName(type, name)) + "_ids" manyArray = record.get name serializedIds = [] manyArray.forEach (record) -&gt; serializedIds.push record.get('id') hash[key] = serializedIds else return @_super hash, record, key, relationship # method to access the serialized option in adapter mapping serializedType: (type, name) -&gt; @mappingOption type, name, 'serialized' </code></pre> <p>And here is a mapping configuration exemple :</p> <pre><code>App.Adapter.map App.Product, categories: serialized: 'ids' </code></pre> <p>With this in place, when I commit a <code>Product</code> the json would contain a key <code>category_ids</code> wich contain the array of associated categories ids.</p> <p>UPDATE:</p> <p>To properly use the <code>App.Serializer</code> defined, you should add it to the adapter of your application :</p> <pre><code>App.Adapter = DS.RESTAdapter.extend serializer: App.Serializer </code></pre> <p>And to use this adapter in your application, you have to set it in the store :</p> <pre><code>App.Store = DS.Store.extend adapter: 'App.Adapter' </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POSave ManyToMany records to rails backend
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USAdrien Coquio
    1. USAdrien Coquio
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POSave ManyToMany records to rails backend
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COI've added your serializer code to store.rb and the following to one of my models: `FP.Adapter.map FP.observation, students: serialized: 'ids'` However when I commit like: `obs.get('students').pushObjects(selected) obs.get('transaction').commit()` I don't see any call to your serializer code? It should be called on commit, right?
      singulars
      1. PO
      1. USMartin Stannard
    2. COYes it should be called on commit if the record is dirty, is a request properly fired in your case ? If not, you may have to mark the record dirty manually as modifying a *many to many* relationship does not flag the record as dirty.
      singulars
      1. PO
      1. USAdrien Coquio
    3. COThe request is fired, I can see it in the network tab. In the json sent to the server the students member of the Observation is an empty array. When I dug down into ember-data I can see it looking through the `relationships` of the Observation model. This only contains the `belongsTo` relationships and none of the `hasMany` relationships. I guess this is why `addHasMany` is not called. So it finds the room and educator data and adds those to the json, but not the student data.
      singulars
      1. PO
      1. USMartin Stannard
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload