| 1 | 1 | var dynamo |
| 2 | | |
| 3 | 1 | try { |
| 4 | 1 | dynamo = require('dynamo-client') |
| 5 | | } catch (e) { |
| 6 | | // Assume consumer will pass in client |
| 7 | | } |
| 8 | | |
| 9 | 1 | module.exports = function(name, options) { |
| 10 | 95 | return new DynamoTable(name, options) |
| 11 | | } |
| 12 | 1 | module.exports.DynamoTable = DynamoTable |
| 13 | | |
| 14 | 1 | function DynamoTable(name, options) { |
| 15 | 97 | if (!name) throw new Error('Table must have a name') |
| 16 | 93 | options = options || {} |
| 17 | 93 | this.name = name |
| 18 | 93 | this.client = options.client |
| 19 | 93 | if (!this.client) { |
| 20 | 35 | if (!dynamo) throw new Error('dynamo-client module is not installed') |
| 21 | 35 | this.client = dynamo.createClient(options.region, options.credentials) |
| 22 | | } |
| 23 | 93 | this.mappings = options.mappings || {} |
| 24 | 93 | this.key = options.key || Object.keys(options.keyTypes || this.mappings).slice(0, 2) |
| 25 | 97 | if (!Array.isArray(this.key)) this.key = [this.key] |
| 26 | 152 | if (!this.key.length) this.key = ['id'] |
| 27 | 93 | this.keyTypes = options.keyTypes || {} |
| 28 | 93 | this.readCapacity = options.readCapacity |
| 29 | 93 | this.writeCapacity = options.writeCapacity |
| 30 | 93 | this.indexes = options.indexes |
| 31 | 93 | this.scanSegments = options.scanSegments |
| 32 | 93 | this.preMapFromDb = options.preMapFromDb |
| 33 | 93 | this.postMapFromDb = options.postMapFromDb |
| 34 | 93 | this.preMapToDb = options.preMapToDb |
| 35 | 93 | this.postMapToDb = options.postMapToDb |
| 36 | | } |
| 37 | | |
| 38 | 1 | DynamoTable.prototype.mapAttrToDb = function(val, key, jsObj) { |
| 39 | 639 | var mapping = this.mappings[key] |
| 40 | 639 | if (mapping) { |
| 41 | 182 | if (typeof mapping.to === 'function') return mapping.to(val, key, jsObj) |
| 42 | 189 | if (mapping === 'json') return {S: JSON.stringify(val)} |
| 43 | 173 | if (val == null || val === '') return |
| 44 | 169 | switch (mapping) { |
| 45 | 135 | case 'S': return {S: String(val)} |
| 46 | 2 | case 'N': return {N: String(val)} |
| 47 | 1 | case 'B': return {B: val.toString('base64')} |
| 48 | 1 | case 'SS': return {SS: typeof val[0] === 'string' ? val : val.map(function(x) { return String(x) })} |
| 49 | 4 | case 'NS': return {NS: val.map(function(x) { return String(x) })} |
| 50 | 4 | case 'BS': return {BS: val.map(function(x) { return x.toString('base64') })} |
| 51 | 5 | case 'bignum': return Array.isArray(val) ? {NS: val} : {N: val} |
| 52 | 19 | case 'isodate': return {S: val.toISOString()} |
| 53 | 1 | case 'timestamp': return {N: String(+val)} |
| 54 | 1 | case 'mapS': return {SS: Object.keys(val)} |
| 55 | 1 | case 'mapN': return {NS: Object.keys(val)} |
| 56 | 1 | case 'mapB': return {BS: Object.keys(val)} |
| 57 | | } |
| 58 | | } |
| 59 | 468 | if (val == null || val === '') return |
| 60 | 448 | switch (typeof val) { |
| 61 | 80 | case 'string': return {S: val} |
| 62 | 2 | case 'boolean': return {S: String(val)} |
| 63 | 350 | case 'number': return {N: String(val)} |
| 64 | | } |
| 65 | 16 | if (Buffer.isBuffer(val)) { |
| 66 | 7 | if (!val.length) return |
| 67 | 3 | return {B: val.toString('base64')} |
| 68 | | } |
| 69 | 11 | if (Array.isArray(val)) { |
| 70 | 11 | if (!val.length) return |
| 71 | 9 | if (typeof val[0] === 'string') return {SS: val} |
| 72 | 16 | if (typeof val[0] === 'number') return {NS: val.map(function(x) { return String(x) })} |
| 73 | 10 | if (Buffer.isBuffer(val[0])) return {BS: val.map(function(x) { return x.toString('base64') })} |
| 74 | | } |
| 75 | 2 | return {S: JSON.stringify(val)} |
| 76 | | } |
| 77 | | |
| 78 | 1 | DynamoTable.prototype.mapAttrFromDb = function(val, key, dbItem) { |
| 79 | 421 | var mapping = this.mappings[key] |
| 80 | 421 | if (mapping) { |
| 81 | 101 | if (typeof mapping.from === 'function') return mapping.from(val, key, dbItem) |
| 82 | 97 | switch (mapping) { |
| 83 | 51 | case 'S': return val.S |
| 84 | 0 | case 'N': return +val.N |
| 85 | 1 | case 'B': return new Buffer(val.B, 'base64') |
| 86 | 1 | case 'SS': return val.SS |
| 87 | 4 | case 'NS': return val.NS.map(function(x) { return +x }) |
| 88 | 4 | case 'BS': return val.BS.map(function(x) { return new Buffer(x, 'base64') }) |
| 89 | 9 | case 'json': return JSON.parse(val.S) |
| 90 | 5 | case 'bignum': return val.N != null ? val.N : val.NS |
| 91 | 24 | case 'isodate': return new Date(val.S) |
| 92 | 1 | case 'timestamp': return new Date(val.N) |
| 93 | | case 'mapS': |
| 94 | | case 'mapN': |
| 95 | | case 'mapB': |
| 96 | 3 | return (val.SS || val.NS || val.BS).reduce(function(mapObj, val) { |
| 97 | 9 | mapObj[val] = 1 |
| 98 | 9 | return mapObj |
| 99 | | }, {}) |
| 100 | | } |
| 101 | | } |
| 102 | 322 | if (val.S != null) { |
| 103 | 41 | if (val.S === 'true') return true |
| 104 | 40 | if (val.S === 'false') return false |
| 105 | 38 | if (val.S[0] === '{' || val.S[0] === '[') |
| 106 | 6 | try { return JSON.parse(val.S) } catch (e) {} |
| 107 | 35 | return val.S |
| 108 | | } |
| 109 | 555 | if (val.N != null) return +val.N |
| 110 | 11 | if (val.B != null) return new Buffer(val.B, 'base64') |
| 111 | 9 | if (val.SS != null) return val.SS |
| 112 | 12 | if (val.NS != null) return val.NS.map(function(x) { return +x }) |
| 113 | 11 | if (val.BS != null) return val.BS.map(function(x) { return new Buffer(x, 'base64') }) |
| 114 | 1 | throw new Error('Unknown DynamoDB type: ' + JSON.stringify(val)) |
| 115 | | } |
| 116 | | |
| 117 | 1 | DynamoTable.prototype.mapToDb = function(jsObj) { |
| 118 | 78 | if (this.preMapToDb) jsObj = this.preMapToDb(jsObj) |
| 119 | 78 | var self = this, |
| 120 | | dbItem = jsObj != null ? {} : null |
| 121 | | |
| 122 | 78 | if (dbItem != null && jsObj != null) { |
| 123 | 77 | Object.keys(jsObj).forEach(function(key) { |
| 124 | 176 | var dbAttr = self.mapAttrToDb(jsObj[key], key, jsObj) |
| 125 | 176 | if (!self._isEmpty(dbAttr)) |
| 126 | 172 | dbItem[key] = dbAttr |
| 127 | | }) |
| 128 | | } |
| 129 | 78 | if (this.postMapToDb) dbItem = this.postMapToDb(dbItem) |
| 130 | 78 | return dbItem |
| 131 | | } |
| 132 | | |
| 133 | 1 | DynamoTable.prototype.mapFromDb = function(dbItem) { |
| 134 | 268 | if (this.preMapFromDb) dbItem = this.preMapFromDb(dbItem) |
| 135 | 268 | var self = this, |
| 136 | | jsObj = dbItem != null ? {} : null |
| 137 | | |
| 138 | 268 | if (dbItem != null && jsObj != null) { |
| 139 | 266 | Object.keys(dbItem).forEach(function(key) { |
| 140 | 349 | var jsAttr = self.mapAttrFromDb(dbItem[key], key, dbItem) |
| 141 | 348 | if (typeof jsAttr !== 'undefined') |
| 142 | 347 | jsObj[key] = jsAttr |
| 143 | | }) |
| 144 | | } |
| 145 | 267 | if (this.postMapFromDb) jsObj = this.postMapFromDb(jsObj) |
| 146 | 267 | return jsObj |
| 147 | | } |
| 148 | | |
| 149 | 1 | DynamoTable.prototype.resolveKey = function(key) { |
| 150 | 288 | var self = this |
| 151 | 288 | if (arguments.length > 1) |
| 152 | 1 | key = [].slice.call(arguments) |
| 153 | 287 | else if (typeof key !== 'object' || Buffer.isBuffer(key)) |
| 154 | 231 | key = [key] |
| 155 | | |
| 156 | 288 | if (Array.isArray(key)) { |
| 157 | 240 | return key.reduce(function(dbKey, val, ix) { |
| 158 | 245 | dbKey[self.key[ix]] = self.mapAttrToDb(val, self.key[ix]) |
| 159 | 245 | return dbKey |
| 160 | | }, {}) |
| 161 | | } |
| 162 | 48 | return Object.keys(key).reduce(function(dbKey, attr) { |
| 163 | 95 | dbKey[attr] = self.mapAttrToDb(key[attr], attr) |
| 164 | 95 | return dbKey |
| 165 | | }, {}) |
| 166 | | } |
| 167 | | |
| 168 | 1 | DynamoTable.prototype._isEmpty = function(attr) { |
| 169 | 188 | return attr == null || attr.S === '' || attr.N === '' || attr.B === '' || |
| 170 | | attr.SS === '[]' || attr.NS === '[]' || attr.BS === '[]' |
| 171 | | } |
| 172 | | |
| 173 | 1 | DynamoTable.prototype._getKeyType = function(attr) { |
| 174 | 36 | var type = this.keyTypes[attr] || this.mappings[attr] || 'S' |
| 175 | 36 | switch (type) { |
| 176 | | case 'N': |
| 177 | | case 'S': |
| 178 | | case 'B': |
| 179 | 34 | return type |
| 180 | | case 'json': |
| 181 | | case 'isodate': |
| 182 | 1 | return 'S' |
| 183 | | case 'bignum': |
| 184 | | case 'timestamp': |
| 185 | 1 | return 'N' |
| 186 | | } |
| 187 | 0 | throw new Error('Unsupported key type (' + type + ') for attr ' + attr) |
| 188 | | } |
| 189 | | |
| 190 | 1 | DynamoTable.prototype.get = function(key, options, cb) { |
| 191 | 17 | if (!cb) { cb = options; options = {} } |
| 192 | 9 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 193 | 9 | options = this._getDefaultOptions(options) |
| 194 | 9 | var self = this |
| 195 | | |
| 196 | 9 | options.Key = options.Key || this.resolveKey(key) |
| 197 | 9 | this.client.request('GetItem', options, function(err, data) { |
| 198 | 10 | if (err) return cb(err) |
| 199 | 8 | cb(null, self.mapFromDb(data.Item)) |
| 200 | | }) |
| 201 | | } |
| 202 | | |
| 203 | 1 | DynamoTable.prototype.put = function(jsObj, options, cb) { |
| 204 | 45 | if (!cb) { cb = options; options = {} } |
| 205 | 15 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 206 | 15 | options.TableName = options.TableName || this.name |
| 207 | | |
| 208 | 15 | options.Item = options.Item || this.mapToDb(jsObj) |
| 209 | 15 | this.client.request('PutItem', options, cb) |
| 210 | | } |
| 211 | | |
| 212 | 1 | DynamoTable.prototype.delete = function(key, options, cb) { |
| 213 | 3 | if (!cb) { cb = options; options = {} } |
| 214 | 1 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 215 | 1 | options.TableName = options.TableName || this.name |
| 216 | | |
| 217 | 1 | options.Key = options.Key || this.resolveKey(key) |
| 218 | 1 | this.client.request('DeleteItem', options, cb) |
| 219 | | } |
| 220 | | |
| 221 | 1 | DynamoTable.prototype.update = function(key, actions, options, cb) { |
| 222 | 58 | if (!cb) { cb = options; options = {} } |
| 223 | 44 | if (!cb) { cb = actions; actions = key; key = null } |
| 224 | 39 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 225 | 37 | options = this._getDefaultOptions(options) |
| 226 | 37 | var self = this, pick, attrUpdates |
| 227 | | |
| 228 | | // If actions is a string or array, then it's a whitelist for attributes to update |
| 229 | 39 | if (typeof actions === 'string') actions = [actions] |
| 230 | 46 | if (Array.isArray(actions)) { pick = actions; actions = key; key = null } |
| 231 | | |
| 232 | | // If key is null, assume actions has a full object to put so clone it (without keys) |
| 233 | 37 | if (key == null) { |
| 234 | 8 | key = this.key.map(function(attr) { return actions[attr] }) |
| 235 | 4 | pick = pick || Object.keys(actions) |
| 236 | 4 | actions = {put: pick.reduce(function(attrsObj, attr) { |
| 237 | 15 | if (!~self.key.indexOf(attr)) attrsObj[attr] = actions[attr] |
| 238 | 8 | return attrsObj |
| 239 | | }, {})} |
| 240 | | } |
| 241 | | |
| 242 | | // If we have some attributes that are not actions (put, add, delete), then throw |
| 243 | 76 | if (Object.keys(actions).some(function(attr) { return !~['put', 'add', 'delete'].indexOf(attr) })) |
| 244 | 0 | throw new Error('actions must only contain put/add/delete attributes') |
| 245 | | |
| 246 | 37 | options.Key = options.Key || this.resolveKey(key) |
| 247 | 37 | attrUpdates = options.AttributeUpdates = options.AttributeUpdates || {} |
| 248 | | |
| 249 | 37 | if (actions.put != null) { |
| 250 | 8 | Object.keys(actions.put).forEach(function(attr) { |
| 251 | 12 | attrUpdates[attr] = attrUpdates[attr] || {Value: self.mapAttrToDb(actions.put[attr], attr)} |
| 252 | 12 | if (self._isEmpty(attrUpdates[attr].Value)) { |
| 253 | 4 | attrUpdates[attr].Action = 'DELETE' // "empty" attributes should actually be deleted |
| 254 | 4 | delete attrUpdates[attr].Value |
| 255 | | } |
| 256 | | }) |
| 257 | | } |
| 258 | | |
| 259 | 37 | if (actions.add != null) { |
| 260 | 29 | Object.keys(actions.add).forEach(function(attr) { |
| 261 | 29 | attrUpdates[attr] = attrUpdates[attr] || |
| 262 | | {Action: 'ADD', Value: self.mapAttrToDb(actions.add[attr], attr)} |
| 263 | | }) |
| 264 | | } |
| 265 | | |
| 266 | 37 | if (actions.delete != null) { |
| 267 | 3 | if (!Array.isArray(actions.delete)) actions.delete = [actions.delete] |
| 268 | 2 | actions.delete.forEach(function(attr) { |
| 269 | 3 | if (typeof attr === 'string') { |
| 270 | 2 | attrUpdates[attr] = attrUpdates[attr] || {Action: 'DELETE'} |
| 271 | | } else { |
| 272 | 1 | Object.keys(attr).forEach(function(setKey) { |
| 273 | 1 | attrUpdates[setKey] = attrUpdates[setKey] || |
| 274 | | {Action: 'DELETE', Value: self.mapAttrToDb(attr[setKey], setKey)} |
| 275 | | }) |
| 276 | | } |
| 277 | | }) |
| 278 | | } |
| 279 | | |
| 280 | 37 | if (!Object.keys(attrUpdates).length) return process.nextTick(cb) |
| 281 | | |
| 282 | 37 | this.client.request('UpdateItem', options, cb) |
| 283 | | } |
| 284 | | |
| 285 | 1 | DynamoTable.prototype.query = function(conditions, options, cb) { |
| 286 | 14 | if (!cb) { cb = options; options = {} } |
| 287 | 8 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 288 | 8 | options = this._getDefaultOptions(options) |
| 289 | 8 | var self = this, nonKeys |
| 290 | | |
| 291 | 8 | options.KeyConditions = options.KeyConditions || this.conditions(conditions) |
| 292 | 8 | if (!options.IndexName) { |
| 293 | 16 | nonKeys = Object.keys(options.KeyConditions).filter(function(attr) { return !~self.key.indexOf(attr) }) |
| 294 | 6 | if (nonKeys.length) { |
| 295 | | // we have a non-key attribute, must find an IndexName |
| 296 | 2 | this.resolveIndexes(this.indexes).forEach(function(index) { |
| 297 | 1 | if (index.key === nonKeys[0]) |
| 298 | 1 | options.IndexName = index.name |
| 299 | | }) |
| 300 | 2 | options.IndexName = options.IndexName || nonKeys[0] |
| 301 | | } |
| 302 | | } |
| 303 | 8 | this._listRequest('Query', options, cb) |
| 304 | | } |
| 305 | | |
| 306 | 1 | DynamoTable.prototype.scan = function(conditions, options, cb) { |
| 307 | 69 | if (!cb) { cb = options; options = {} } |
| 308 | 63 | if (!cb) { cb = conditions; conditions = null } |
| 309 | 37 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 310 | 37 | options = this._getDefaultOptions(options) |
| 311 | 37 | var totalSegments, segment, allItems |
| 312 | | |
| 313 | 45 | if (conditions != null && !options.ScanFilter) options.ScanFilter = this.conditions(conditions) |
| 314 | 37 | options.TotalSegments = options.TotalSegments || this.scanSegments |
| 315 | | |
| 316 | 37 | if (options.Segment == null && options.TotalSegments) { |
| 317 | 5 | totalSegments = options.TotalSegments |
| 318 | 5 | allItems = new Array(totalSegments) |
| 319 | 5 | for (segment = 0; segment < totalSegments; segment++) |
| 320 | 15 | this.scan(null, cloneWithSegment(options, segment), checkDone(segment)) |
| 321 | | } else { |
| 322 | 32 | this._listRequest('Scan', options, cb) |
| 323 | | } |
| 324 | 37 | function cloneWithSegment(options, segment) { |
| 325 | 15 | return Object.keys(options).reduce(function(clone, key) { |
| 326 | 51 | clone[key] = options[key] |
| 327 | 51 | return clone |
| 328 | | }, {Segment: segment}) |
| 329 | | } |
| 330 | 37 | function checkDone(segment) { |
| 331 | 15 | return function (err, items) { |
| 332 | 15 | if (err) return cb(err) |
| 333 | 15 | allItems[segment] = items |
| 334 | 15 | if (!--totalSegments) { |
| 335 | 5 | if (options.Select === 'COUNT') |
| 336 | 6 | return cb(null, allItems.reduce(function(sum, count) { return sum + count })) |
| 337 | 3 | cb(null, [].concat.apply([], allItems)) |
| 338 | | } |
| 339 | | } |
| 340 | | } |
| 341 | | } |
| 342 | | |
| 343 | | // http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_BatchGetItem.html |
| 344 | 1 | DynamoTable.MAX_GET = 100 |
| 345 | 1 | DynamoTable.prototype.batchGet = function(keys, options, tables, cb) { |
| 346 | 13 | if (!cb) { cb = tables; tables = [] } |
| 347 | 11 | if (!cb) { cb = options; options = {} } |
| 348 | 5 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 349 | 5 | var self = this, |
| 350 | | onlyThis = false, |
| 351 | | tablesByName = {}, |
| 352 | | allKeys, numRequests, allResults, i, j, key, requestItems, requestItem, opt |
| 353 | | |
| 354 | 5 | if (keys && keys.length) { |
| 355 | 5 | tables.unshift({table: this, keys: keys, options: options}) |
| 356 | 5 | onlyThis = tables.length === 1 |
| 357 | | } |
| 358 | 5 | allKeys = tables.map(function(tableObj) { |
| 359 | 6 | var table = tableObj.table, keys = tableObj.keys, options = tableObj.options |
| 360 | 6 | tablesByName[table.name] = table |
| 361 | 6 | if (Array.isArray(options)) |
| 362 | 0 | options = {AttributesToGet: options} |
| 363 | 6 | else if (typeof options === 'string') |
| 364 | 2 | options = {AttributesToGet: [options]} |
| 365 | 6 | return keys.map(function(key) { |
| 366 | 215 | var dbKey = table.resolveKey(key) |
| 367 | 215 | dbKey._table = table.name |
| 368 | 215 | dbKey._options = options || {} |
| 369 | 215 | return dbKey |
| 370 | | }) |
| 371 | | }) |
| 372 | 5 | allKeys = [].concat.apply([], allKeys) |
| 373 | 5 | numRequests = Math.ceil(allKeys.length / DynamoTable.MAX_GET) |
| 374 | 5 | allResults = new Array(numRequests) |
| 375 | | |
| 376 | 5 | for (i = 0; i < allKeys.length; i += DynamoTable.MAX_GET) { |
| 377 | 7 | requestItems = {} |
| 378 | 7 | for (j = i; j < i + DynamoTable.MAX_GET && j < allKeys.length; j++) { |
| 379 | 215 | key = allKeys[j] |
| 380 | 215 | requestItem = requestItems[key._table] = (requestItems[key._table] || {}) |
| 381 | 215 | for (opt in key._options) |
| 382 | 6 | requestItem[opt] = key._options[opt] |
| 383 | 215 | requestItem.Keys = requestItem.Keys || [] |
| 384 | 215 | requestItem.Keys.push(key) |
| 385 | 215 | delete key._table |
| 386 | 215 | delete key._options |
| 387 | | } |
| 388 | 7 | batchRequest(requestItems, checkDone(i / DynamoTable.MAX_GET)) |
| 389 | | } |
| 390 | | |
| 391 | 5 | function batchRequest(requestItems, results, cb) { |
| 392 | 23 | if (!cb) { cb = results; results = {} } |
| 393 | 9 | self.client.request('BatchGetItem', {RequestItems: requestItems}, function(err, data) { |
| 394 | 9 | if (err) return cb(err) |
| 395 | 9 | for (var name in data.Responses) { |
| 396 | 10 | results[name] = (results[name] || []).concat( |
| 397 | | data.Responses[name].map(tablesByName[name].mapFromDb.bind(tablesByName[name]))) |
| 398 | | } |
| 399 | 9 | if (Object.keys(data.UnprocessedKeys || {}).length) |
| 400 | 2 | return batchRequest(data.UnprocessedKeys, results, cb) |
| 401 | 7 | cb(null, results) |
| 402 | | }) |
| 403 | | } |
| 404 | | |
| 405 | 5 | function checkDone(ix) { |
| 406 | 7 | return function (err, results) { |
| 407 | 7 | if (err) return cb(err) |
| 408 | 7 | allResults[ix] = results |
| 409 | 7 | if (!--numRequests) { |
| 410 | 5 | var merged = {} |
| 411 | 5 | allResults.forEach(function(results) { |
| 412 | 7 | for (var name in results) |
| 413 | 8 | merged[name] = (merged[name] || []).concat(results[name]) |
| 414 | | }) |
| 415 | 5 | cb(null, onlyThis ? merged[self.name] : merged) |
| 416 | | } |
| 417 | | } |
| 418 | | } |
| 419 | | } |
| 420 | | |
| 421 | | // http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_BatchWriteItem.html |
| 422 | 1 | DynamoTable.MAX_WRITE = 25 |
| 423 | 1 | DynamoTable.prototype.batchWrite = function(operations, tables, cb) { |
| 424 | 40 | if (!cb) { cb = tables; tables = [] } |
| 425 | 14 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 426 | 14 | var self = this, |
| 427 | | allOperations, numRequests, i, j, requestItems, operation |
| 428 | | |
| 429 | 14 | if (operations && Object.keys(operations).length) |
| 430 | 14 | tables.unshift({table: this, operations: operations}) |
| 431 | | |
| 432 | 14 | allOperations = tables.map(function(tableObj) { |
| 433 | 15 | var table = tableObj.table, operations = tableObj.operations || [], ops |
| 434 | 20 | if (Array.isArray(operations)) operations = {puts: operations, deletes: []} |
| 435 | 15 | ops = (operations.puts || []).map(function(jsObj) { |
| 436 | 60 | return {PutRequest: {Item: table.mapToDb(jsObj)}, _table: table.name} |
| 437 | | }) |
| 438 | 15 | return ops.concat((operations.deletes || []).map(function(key) { |
| 439 | 20 | return {DeleteRequest: {Key: table.resolveKey(key)}, _table: table.name} |
| 440 | | })) |
| 441 | | }) |
| 442 | 14 | allOperations = [].concat.apply([], allOperations) |
| 443 | 14 | numRequests = Math.ceil(allOperations.length / DynamoTable.MAX_WRITE) |
| 444 | | |
| 445 | 14 | for (i = 0; i < allOperations.length; i += DynamoTable.MAX_WRITE) { |
| 446 | 16 | requestItems = {} |
| 447 | 16 | for (j = i; j < i + DynamoTable.MAX_WRITE && j < allOperations.length; j++) { |
| 448 | 80 | operation = allOperations[j] |
| 449 | 80 | requestItems[operation._table] = requestItems[operation._table] || [] |
| 450 | 80 | requestItems[operation._table].push(operation) |
| 451 | 80 | delete operation._table |
| 452 | | } |
| 453 | 16 | batchRequest(requestItems, checkDone) |
| 454 | | } |
| 455 | | |
| 456 | 14 | function batchRequest(requestItems, cb) { |
| 457 | 18 | self.client.request('BatchWriteItem', {RequestItems: requestItems}, function(err, data) { |
| 458 | 18 | if (err) return cb(err) |
| 459 | 18 | if (Object.keys(data.UnprocessedItems || {}).length) |
| 460 | 2 | return batchRequest(data.UnprocessedItems, cb) |
| 461 | 16 | cb() |
| 462 | | }) |
| 463 | | } |
| 464 | | |
| 465 | 14 | function checkDone(err) { |
| 466 | 16 | if (err) return cb(err) |
| 467 | 16 | if (!--numRequests) |
| 468 | 14 | cb() |
| 469 | | } |
| 470 | | } |
| 471 | | |
| 472 | 1 | DynamoTable.prototype.createTable = function(readCapacity, writeCapacity, indexes, options, cb) { |
| 473 | 43 | if (!cb) { cb = options; options = {} } |
| 474 | 27 | if (!cb) { cb = indexes; indexes = this.indexes } |
| 475 | 25 | if (!cb) { cb = writeCapacity; writeCapacity = this.writeCapacity || 1 } |
| 476 | 25 | if (!cb) { cb = readCapacity; readCapacity = this.readCapacity || 1 } |
| 477 | 15 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 478 | 15 | options.TableName = options.TableName || this.name |
| 479 | 15 | var self = this, |
| 480 | | attrMap = this.key.reduce(function(namesObj, attr) { |
| 481 | 25 | namesObj[attr] = true |
| 482 | 25 | return namesObj |
| 483 | | }, {}) |
| 484 | | |
| 485 | 15 | if (indexes && !options.LocalSecondaryIndexes) { |
| 486 | 10 | options.LocalSecondaryIndexes = this.resolveIndexes(indexes).map(function(index) { |
| 487 | 13 | var lsi = { |
| 488 | | IndexName: index.name, |
| 489 | | KeySchema: [self.key[0], index.key].map(function(attr, ix) { |
| 490 | 26 | return { AttributeName: attr, KeyType: ix === 0 ? 'HASH' : 'RANGE' } |
| 491 | | }), |
| 492 | | } |
| 493 | 13 | if (typeof index.projection === 'string') |
| 494 | 12 | lsi.Projection = {ProjectionType: index.projection} |
| 495 | 1 | else if (Array.isArray(index.projection)) |
| 496 | 1 | lsi.Projection = {ProjectionType: 'INCLUDE', NonKeyAttributes: index.projection} |
| 497 | | |
| 498 | 13 | attrMap[index.key] = true |
| 499 | | |
| 500 | 13 | return lsi |
| 501 | | }) |
| 502 | | } |
| 503 | 15 | options.KeySchema = options.KeySchema || this.key.map(function(attr, ix) { |
| 504 | 25 | return {AttributeName: attr, KeyType: ix === 0 ? 'HASH' : 'RANGE'} |
| 505 | | }) |
| 506 | 15 | options.AttributeDefinitions = options.AttributeDefinitions || Object.keys(attrMap).map(function(attr) { |
| 507 | 36 | return {AttributeName: attr, AttributeType: self._getKeyType(attr)} |
| 508 | | }) |
| 509 | 15 | options.ProvisionedThroughput = options.ProvisionedThroughput || { |
| 510 | | ReadCapacityUnits: readCapacity, |
| 511 | | WriteCapacityUnits: writeCapacity, |
| 512 | | } |
| 513 | 15 | this.client.request('CreateTable', options, function(err, data) { |
| 514 | 15 | if (err) return cb(err) |
| 515 | 15 | cb(null, data.TableDescription) |
| 516 | | }) |
| 517 | | } |
| 518 | | |
| 519 | 1 | DynamoTable.prototype.describeTable = function(options, cb) { |
| 520 | 18 | if (!cb) { cb = options; options = {} } |
| 521 | 6 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 522 | 6 | options.TableName = options.TableName || this.name |
| 523 | | |
| 524 | 6 | this.client.request('DescribeTable', options, function(err, data) { |
| 525 | 9 | if (err) return cb(err) |
| 526 | 3 | cb(null, data.Table) |
| 527 | | }) |
| 528 | | } |
| 529 | | |
| 530 | 1 | DynamoTable.prototype.updateTable = function(readCapacity, writeCapacity, options, cb) { |
| 531 | 6 | if (!cb) { cb = options; options = {} } |
| 532 | 2 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 533 | 2 | options.TableName = options.TableName || this.name |
| 534 | | |
| 535 | 2 | options.ProvisionedThroughput = options.ProvisionedThroughput || { |
| 536 | | ReadCapacityUnits: readCapacity, |
| 537 | | WriteCapacityUnits: writeCapacity, |
| 538 | | } |
| 539 | 2 | this.client.request('UpdateTable', options, function(err, data) { |
| 540 | 2 | if (err) return cb(err) |
| 541 | 2 | cb(null, data.TableDescription) |
| 542 | | }) |
| 543 | | } |
| 544 | | |
| 545 | 1 | DynamoTable.prototype.deleteTable = function(options, cb) { |
| 546 | 4 | if (!cb) { cb = options; options = {} } |
| 547 | 2 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 548 | 2 | options.TableName = options.TableName || this.name |
| 549 | | |
| 550 | 2 | this.client.request('DeleteTable', options, function(err, data) { |
| 551 | 2 | if (err) return cb(err) |
| 552 | 2 | cb(null, data.TableDescription) |
| 553 | | }) |
| 554 | | } |
| 555 | | |
| 556 | | // TODO: Support ExclusiveStartTableName/LastEvaluatedTableName |
| 557 | 1 | DynamoTable.prototype.listTables = function(options, cb) { |
| 558 | 6 | if (!cb) { cb = options; options = {} } |
| 559 | 2 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 560 | | |
| 561 | 2 | this.client.request('ListTables', options, function(err, data) { |
| 562 | 2 | if (err) return cb(err) |
| 563 | 2 | cb(null, data.TableNames) |
| 564 | | }) |
| 565 | | } |
| 566 | | |
| 567 | 1 | DynamoTable.prototype.deleteTableAndWait = function(options, cb) { |
| 568 | 7 | if (!cb) { cb = options; options = {} } |
| 569 | 3 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 570 | 3 | var self = this |
| 571 | 3 | this.describeTable(function(err, data) { |
| 572 | 5 | if (err && err.name === 'ResourceNotFoundException') return cb() |
| 573 | 1 | if (err) return cb(err) |
| 574 | | |
| 575 | 1 | if (data.TableStatus !== 'ACTIVE') return setTimeout(self.deleteTableAndWait.bind(self, options, cb), 1000) |
| 576 | | |
| 577 | 1 | self.deleteTable(options, function(err) { |
| 578 | 1 | if (err) return cb(err) |
| 579 | 1 | self.deleteTableAndWait(options, cb) |
| 580 | | }) |
| 581 | | }) |
| 582 | | } |
| 583 | | |
| 584 | 1 | DynamoTable.prototype.createTableAndWait = function(readCapacity, writeCapacity, indexes, options, cb) { |
| 585 | 4 | if (!cb) { cb = options; options = {} } |
| 586 | 4 | if (!cb) { cb = indexes; indexes = this.indexes } |
| 587 | 4 | if (!cb) { cb = writeCapacity; writeCapacity = this.writeCapacity || 1 } |
| 588 | 4 | if (!cb) { cb = readCapacity; readCapacity = this.readCapacity || 1 } |
| 589 | 2 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 590 | 2 | var self = this |
| 591 | 2 | this.describeTable(function(err, data) { |
| 592 | 2 | if (err && err.name === 'ResourceNotFoundException') { |
| 593 | 1 | return self.createTable(readCapacity, writeCapacity, indexes, options, function(err) { |
| 594 | 1 | if (err) return cb(err) |
| 595 | 1 | self.createTableAndWait(readCapacity, writeCapacity, indexes, options, cb) |
| 596 | | }) |
| 597 | | } |
| 598 | 1 | if (err) return cb(err) |
| 599 | | |
| 600 | 2 | if (data.TableStatus === 'ACTIVE') return cb() |
| 601 | 0 | if (data.TableStatus !== 'CREATING') return cb(new Error(data.TableStatus)) |
| 602 | | |
| 603 | 0 | setTimeout(self.createTableAndWait.bind(self, readCapacity, writeCapacity, indexes, options, cb), 1000) |
| 604 | | }) |
| 605 | | } |
| 606 | | |
| 607 | 1 | DynamoTable.prototype.increment = function(key, attr, incrAmt, options, cb) { |
| 608 | 28 | var self = this, actions |
| 609 | 84 | if (!cb) { cb = options; options = {} } |
| 610 | 82 | if (!cb) { cb = incrAmt; incrAmt = 1 } |
| 611 | 28 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 612 | | |
| 613 | 28 | options.ReturnValues = options.ReturnValues || 'UPDATED_NEW' |
| 614 | 28 | actions = {add: {}} |
| 615 | 28 | actions.add[attr] = incrAmt |
| 616 | 28 | this.update(key, actions, options, function(err, data) { |
| 617 | 28 | if (err) return cb(err) |
| 618 | 28 | var newVal = (data.Attributes != null ? data.Attributes[attr] : null) |
| 619 | 28 | if (newVal == null) return cb() |
| 620 | 28 | cb(null, self.mapAttrFromDb(newVal, attr)) |
| 621 | | }) |
| 622 | | } |
| 623 | | |
| 624 | 1 | DynamoTable.prototype._listRequest = function(operation, items, options, cb) { |
| 625 | 164 | if (!cb) { cb = options; options = items; items = [] } |
| 626 | 44 | if (typeof cb !== 'function') throw new Error('Last parameter must be a callback function') |
| 627 | 44 | var self = this |
| 628 | | |
| 629 | 44 | this.client.request(operation, options, function(err, data) { |
| 630 | 44 | if (err) return cb(err) |
| 631 | 55 | if (options.Select === 'COUNT') return cb(null, data.Count) |
| 632 | | |
| 633 | 73 | items = items.concat(data.Items.map(function(item) { return self.mapFromDb(item) })) |
| 634 | 33 | if (data.LastEvaluatedKey != null && (!options.Limit || options.Limit !== (data.ScannedCount || data.Count))) { |
| 635 | 4 | options.ExclusiveStartKey = data.LastEvaluatedKey |
| 636 | 4 | return self._listRequest(operation, items, options, cb) |
| 637 | | } |
| 638 | 29 | cb(null, items) |
| 639 | | }) |
| 640 | | } |
| 641 | | |
| 642 | 1 | DynamoTable.prototype.conditions = function(conditionExprObj) { |
| 643 | 16 | var self = this |
| 644 | 16 | return Object.keys(conditionExprObj).reduce(function(condObj, attr) { |
| 645 | 30 | condObj[attr] = self.condition(attr, conditionExprObj[attr]) |
| 646 | 30 | return condObj |
| 647 | | }, {}) |
| 648 | | } |
| 649 | | |
| 650 | 1 | DynamoTable.prototype.condition = function(key, conditionExpr) { |
| 651 | 30 | var self = this, |
| 652 | | type = typeof conditionExpr, |
| 653 | | comparison, attrVals, cond |
| 654 | | |
| 655 | 30 | if (conditionExpr === null) { |
| 656 | 0 | comparison = 'NULL' |
| 657 | 30 | } else if (conditionExpr === 'notNull' || conditionExpr === 'NOT_NULL') { |
| 658 | 0 | comparison = 'NOT_NULL' |
| 659 | 30 | } else if (type === 'string' || type === 'number' || Buffer.isBuffer(conditionExpr)) { |
| 660 | 16 | comparison = 'EQ' |
| 661 | 16 | attrVals = [conditionExpr] |
| 662 | 14 | } else if (Array.isArray(conditionExpr)) { |
| 663 | 0 | comparison = 'IN' |
| 664 | 0 | attrVals = conditionExpr |
| 665 | | } else { |
| 666 | 14 | comparison = Object.keys(conditionExpr)[0] |
| 667 | 14 | attrVals = conditionExpr[comparison] |
| 668 | 28 | if (!Array.isArray(attrVals)) attrVals = [attrVals] |
| 669 | 14 | comparison = this.comparison(comparison) |
| 670 | | } |
| 671 | 30 | cond = {ComparisonOperator: comparison} |
| 672 | 30 | if (attrVals != null) |
| 673 | 60 | cond.AttributeValueList = attrVals.map(function(val) { return self.mapAttrToDb(val, key) }) |
| 674 | 30 | return cond |
| 675 | | } |
| 676 | | |
| 677 | 1 | DynamoTable.prototype.comparison = function(comparison) { |
| 678 | 14 | switch (comparison) { |
| 679 | 0 | case '=': return 'EQ' |
| 680 | 0 | case '==': return 'EQ' |
| 681 | 0 | case '!=': return 'NE' |
| 682 | 0 | case '<=': return 'LE' |
| 683 | 0 | case '<': return 'LT' |
| 684 | 14 | case '>': return 'GT' |
| 685 | 0 | case '>=': return 'GE' |
| 686 | 0 | case '>=<=': return 'BETWEEN' |
| 687 | | case 'beginsWith': |
| 688 | | case 'startsWith': |
| 689 | 0 | return 'BEGINS_WITH' |
| 690 | | case 'notContains': |
| 691 | | case 'doesNotContain': |
| 692 | 0 | return 'NOT_CONTAINS' |
| 693 | | } |
| 694 | 0 | return comparison.toUpperCase() |
| 695 | | } |
| 696 | | |
| 697 | | // indexes: |
| 698 | | // [attr1/name1, attr2/name2] |
| 699 | | // {name: attr1} |
| 700 | | // {name: {key: attr1, projection: 'KEYS_ONLY'}} |
| 701 | | // {name: {key: attr1, projection: [attr1, attr2]}} |
| 702 | | // [{name: name1, key: attr1}, {name: name2, key: attr2}] |
| 703 | 1 | DynamoTable.prototype.resolveIndexes = function(indexes) { |
| 704 | 13 | if (!indexes) return [] |
| 705 | 11 | if (!Array.isArray(indexes)) { |
| 706 | 7 | indexes = Object.keys(indexes).map(function(name) { |
| 707 | 8 | var index = indexes[name] |
| 708 | 14 | if (typeof index === 'string') index = {key: index} |
| 709 | 8 | return {name: name, key: index.key, projection: index.projection} |
| 710 | | }) |
| 711 | | } |
| 712 | 11 | return indexes.map(function(index) { |
| 713 | 18 | if (typeof index === 'string') index = {name: index, key: index} |
| 714 | 14 | index.projection = index.projection || 'ALL' |
| 715 | 14 | return index |
| 716 | | }) |
| 717 | | } |
| 718 | | |
| 719 | 1 | DynamoTable.prototype._getDefaultOptions = function(options) { |
| 720 | 91 | if (options == null) |
| 721 | 0 | options = {} |
| 722 | 91 | else if (Array.isArray(options)) |
| 723 | 1 | options = {AttributesToGet: options} |
| 724 | 90 | else if (typeof options === 'string') |
| 725 | 1 | options = {AttributesToGet: [options]} |
| 726 | 91 | options.TableName = options.TableName || this.name |
| 727 | 91 | return options |
| 728 | | } |
| 729 | | |
| 730 | | |