gistfile1.js

// ==========================================================================
// Project:   BB.Concept
// Copyright: ©2009 My Company, Inc.
// ==========================================================================
/*globals BB */

/** @class

  (Document your Model here)

  @extends SC.Record
  @version 0.1
*/


BB.Concept = SC.Record.extend(
/** @scope BB.Concept.prototype */ {

  couchView:    "concepts",
  primaryKey:   "_id",
  
  user:         SC.Record.toOne('BB.User',      { isRequired: YES }),
  library:      SC.Record.toOne('BB.Library', { isRequired: YES }),
  date:         SC.Record.attr( 'SC.DateTime',  { isRequired: YES }),
  
  toUserLibrary: SC.Record.attr(Boolean, {defaultValue: NO}),
  
  descriptions: SC.Record.toManyByKey('BB.Description', 'concept', {orderBy: "date DESC"}),
  
  units:        SC.Record.toManyByKey('BB.Unit',        'concept', {orderBy: "date"}),
  //unitsStoreKeys: [],
  //unitsStoreKeysBinding: '.units.storeKeys',
  
  properties:   SC.Record.toManyByKey('BB.Property',    'concept', {orderBy: "date"}),
              
  relations: SC.RecordAttribute.create(
    /** @scope SC.ToManyRelation.prototype */ {
  
    /**  @private - adapted for this toMany relationship */
  
    toType: function(record, key, value) {
      var conditions  = 'concept1 = {record} OR concept2 = {record}';
      var parameters  = {record: record};
      var orderBy     = "date";
      var recordType  = BB.Relation;
      var store       = record.get('store');
  
      var queryCacheKey = '__many_query__'+SC.guidFor(recordType)+"__"+conditions;
      var query         = record[queryCacheKey];
      var recsCacheKey  = '__many_records__'+SC.guidFor(recordType)+"__"+conditions;
      var recs          = record[recsCacheKey] ;
  
      if (!query) {
        query = record[queryCacheKey] = SC.Query.create({
          recordType: recordType,
          conditions: conditions,
          parameters: parameters,
          orderBy: orderBy
        });
      }
  
      if (!recs) {
        recs = record[recsCacheKey] = store.findAll(query);
      }
  
      return recs ;
    }
  
  
  }),
  
  unitsDidChange: function() { this.propertyDidChange('units'); }.observes('.units.storeKeys'),
  
  activeUnits: function(){
    var us = this.get('units');
    
    if (us == this.previousUnits) return this.previousActiveUnits;
    
    this.previousUnits = us;
    
    var l = us.get('length');
    var list = [];
    var deleted = [];
    var i, u, j, d;
    
    for (i=0; i < l; i++) {
      u = us.objectAt(i);
      if ( list.indexOf(u) >= 0 ) {
        // don't add this again!
      }
      else {
        d = u.get('deletes');
        if ( d )  deleted.push(d);
        else      list.push(u);
      }
    }
    
    l = deleted.length;
    for (i=0; i < l; i++) {
      j = list.indexOf(deleted[i])
      if (j>=0){
        list.splice(j,1);
      }
    }
    
    this.previousActiveUnits = list;
    return list;
  }.property('units').cacheable(),
  
  description: function(){
    var ret = "";
    if (this.get('descriptions') && this.get('descriptions').length()>0)
      ret = this.get('descriptions').objectAt(0).get('plural');
    return ret;
  }.property('descriptions'),
  
  singular: function(){
    var ds = this.get('descriptions');
    var d = ds ? ds.objectAt(0) : null;
    
    return d ? d.get('singular') : "";
  }.property('descriptions'),
  
  plural: function(){
    var ds = this.get('descriptions');
    var d = ds ? ds.objectAt(0) : null;
    
    return d ? d.get('plural') : "";
  }.property('descriptions')
  
  
  

}) ;