| 149 | }; |
| 150 | |
| 151 | function extendInstance(Model, Instance, Driver, association) { |
| 152 | var promiseFunctionPostfix = Model.settings.get('promiseFunctionPostfix'); |
| 153 | Object.defineProperty(Instance, association.hasAccessor, { |
| 154 | value: function (opts, cb) { |
| 155 | if (typeof opts === "function") { |
| 156 | cb = opts; |
| 157 | opts = {}; |
| 158 | } |
| 159 | |
| 160 | if (util.hasValues(Instance, Object.keys(association.field))) { |
| 161 | association.model.get(util.values(Instance, Object.keys(association.field)), opts, function (err, instance) { |
| 162 | return cb(err, instance ? true : false); |
| 163 | }); |
| 164 | } else { |
| 165 | cb(null, false); |
| 166 | } |
| 167 | |
| 168 | return this; |
| 169 | }, |
| 170 | enumerable: false, |
| 171 | writable: true |
| 172 | }); |
| 173 | Object.defineProperty(Instance, association.getAccessor, { |
| 174 | value: function (opts, cb) { |
| 175 | if (typeof opts === "function") { |
| 176 | cb = opts; |
| 177 | opts = {}; |
| 178 | } |
| 179 | |
| 180 | var saveAndReturn = function (err, Assoc) { |
| 181 | if (!err) { |
| 182 | Instance[association.name] = Assoc; |
| 183 | } |
| 184 | |
| 185 | return cb(err, Assoc); |
| 186 | }; |
| 187 | |
| 188 | if (association.reversed) { |
| 189 | if (util.hasValues(Instance, Model.id)) { |
| 190 | if (typeof cb !== "function") { |
| 191 | return association.model.find(util.getConditions(Model, Object.keys(association.field), Instance), opts); |
| 192 | } |
| 193 | association.model.find(util.getConditions(Model, Object.keys(association.field), Instance), opts, saveAndReturn); |
| 194 | } else { |
| 195 | cb(null); |
| 196 | } |
| 197 | } else { |
| 198 | if (Instance.isShell()) { |
| 199 | Model.get(util.values(Instance, Model.id), function (err, instance) { |
| 200 | if (err || !util.hasValues(instance, Object.keys(association.field))) { |
| 201 | return cb(null); |
| 202 | } |
| 203 | association.model.get(util.values(instance, Object.keys(association.field)), opts, saveAndReturn); |
| 204 | }); |
| 205 | } else if (util.hasValues(Instance, Object.keys(association.field))) { |
| 206 | association.model.get(util.values(Instance, Object.keys(association.field)), opts, saveAndReturn); |
| 207 | } else { |
| 208 | cb(null); |