/Source/Categories/NSManagedObject+MagicalRecord.m

https://github.com/thedistance/MagicalRecord · Objective C · 682 lines · 539 code · 139 blank · 4 comment · 10 complexity · 920969c7889c2a5a23ea654cd56f8e04 MD5 · raw file 

    

  1. //  Created by Saul Mora on 11/15/09.
    2. 

  2. //  Copyright 2010 Magical Panda Software, LLC All rights reserved.
    3. 

  3. //
    4. 

  4. 

  5. //#import "NSManagedObject+MagicalRecord.h"
    6. 

  6. #import "CoreData+MagicalRecord.h"
    7. 

  7. 

  8. static NSUInteger defaultBatchSize = kMagicalRecordDefaultBatchSize;
    9. 

  9. 

  10. @implementation NSManagedObject (MagicalRecord)
    11. 

  11. 

  12. 

  13. + (NSString *)entityName {
    14. 

  14.     
    15. 

  15.     return NSStringFromClass([self class]);
    16. 

  16. }
    17. 

  17. 

  18. 

  19. + (void) setDefaultBatchSize:(NSUInteger)newBatchSize
    20. 

  20. {
    21. 

  21. 	@synchronized(self)
    22. 

  22. 	{
    23. 

  23. 		defaultBatchSize = newBatchSize;
    24. 

  24. 	}
    25. 

  25. }
    26. 

  26. 

  27. + (NSUInteger) defaultBatchSize
    28. 

  28. {
    29. 

  29. 	return defaultBatchSize;
    30. 

  30. }
    31. 

  31. 

  32. + (NSArray *) executeFetchRequest:(NSFetchRequest *)request inContext:(NSManagedObjectContext *)context
    33. 

  33. {
    34. 

  34. 	NSError *error = nil;
    35. 

  35. 	
    36. 

  36. 	NSArray *results = [context executeFetchRequest:request error:&error];
    37. 

  37. 	[MagicalRecordHelpers handleErrors:error];
    38. 

  38. 	return results;	
    39. 

  39. }
    40. 

  40. 

  41. + (NSArray *) executeFetchRequest:(NSFetchRequest *)request 
    42. 

  42. {
    43. 

  43. 	return [self executeFetchRequest:request inContext:[NSManagedObjectContext contextForCurrentThread]];
    44. 

  44. }
    45. 

  45. 

  46. + (id) executeFetchRequestAndReturnFirstObject:(NSFetchRequest *)request inContext:(NSManagedObjectContext *)context
    47. 

  47. {
    48. 

  48. 	[request setFetchLimit:1];
    49. 

  49. 	
    50. 

  50. 	NSArray *results = [self executeFetchRequest:request inContext:context];
    51. 

  51. 	if ([results count] == 0)
    52. 

  52. 	{
    53. 

  53. 		return nil;
    54. 

  54. 	}
    55. 

  55. 	return [results objectAtIndex:0];
    56. 

  56. }
    57. 

  57. 

  58. + (id) executeFetchRequestAndReturnFirstObject:(NSFetchRequest *)request
    59. 

  59. {
    60. 

  60. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:[NSManagedObjectContext contextForCurrentThread]];
    61. 

  61. }
    62. 

  62. 

  63. #if TARGET_OS_IPHONE
    64. 

  64. 

  65. + (void) performFetch:(NSFetchedResultsController *)controller
    66. 

  66. {
    67. 

  67. 	NSError *error = nil;
    68. 

  68. 	if (![controller performFetch:&error])
    69. 

  69. 	{
    70. 

  70. 		[MagicalRecordHelpers handleErrors:error];
    71. 

  71. 	}
    72. 

  72. }
    73. 

  73. 

  74. #endif
    75. 

  75. 

  76. + (NSEntityDescription *)entityDescriptionInContext:(NSManagedObjectContext *)context
    77. 

  77. {
    78. 

  78.     if ([self respondsToSelector:@selector(entityInManagedObjectContext:)]) 
    79. 

  79.     {
    80. 

  80.         NSEntityDescription *entity = [self performSelector:@selector(entityInManagedObjectContext:) withObject:context];
    81. 

  81.         return entity;
    82. 

  82.     }
    83. 

  83.     else
    84. 

  84.     {
    85. 

  85.         NSString *entityName = [self entityName];
    86. 

  86.         return [NSEntityDescription entityForName:entityName inManagedObjectContext:context];
    87. 

  87.     }
    88. 

  88. }
    89. 

  89. 

  90. + (NSEntityDescription *)entityDescription
    91. 

  91. {
    92. 

  92. 	return [self entityDescriptionInContext:[NSManagedObjectContext contextForCurrentThread]];
    93. 

  93. }
    94. 

  94. 

  95. + (NSArray *)propertiesNamed:(NSArray *)properties
    96. 

  96. {
    97. 

  97. 	NSEntityDescription *description = [self entityDescription];
    98. 

  98. 	NSMutableArray *propertiesWanted = [NSMutableArray array];
    99. 

  99. 	
    100. 

  100. 	if (properties)
    101. 

  101. 	{
    102. 

  102. 		NSDictionary *propDict = [description propertiesByName];
    103. 

  103. 		
    104. 

  104. 		for (NSString *propertyName in properties)
    105. 

  105. 		{
    106. 

  106. 			NSPropertyDescription *property = [propDict objectForKey:propertyName];
    107. 

  107. 			if (property)
    108. 

  108. 			{
    109. 

  109. 				[propertiesWanted addObject:property];
    110. 

  110. 			}
    111. 

  111. 			else
    112. 

  112. 			{
    113. 

  113. 				ARLog(@"Property '%@' not found in %@ properties for %@", propertyName, [propDict count], NSStringFromClass(self));
    114. 

  114. 			}
    115. 

  115. 		}
    116. 

  116. 	}
    117. 

  117. 	return propertiesWanted;
    118. 

  118. }
    119. 

  119. 

  120. + (NSArray *) sortAscending:(BOOL)ascending attributes:(NSArray *)attributesToSortBy
    121. 

  121. {
    122. 

  122. 	NSMutableArray *attributes = [NSMutableArray array];
    123. 

  123.     
    124. 

  124.     for (NSString *attributeName in attributesToSortBy) 
    125. 

  125.     {
    126. 

  126.         NSSortDescriptor *sortDescriptor = [[[NSSortDescriptor alloc] initWithKey:attributeName ascending:ascending] autorelease];
    127. 

  127.         [attributes addObject:sortDescriptor];
    128. 

  128.     }
    129. 

  129.     
    130. 

  130. 	return attributes;
    131. 

  131. }
    132. 

  132. 

  133. + (NSArray *) ascendingSortDescriptors:(NSArray *)attributesToSortBy
    134. 

  134. {
    135. 

  135. 	return [self sortAscending:YES attributes:attributesToSortBy];
    136. 

  136. }
    137. 

  137. 

  138. + (NSArray *) descendingSortDescriptors:(NSArray *)attributesToSortBy
    139. 

  139. {
    140. 

  140. 	return [self sortAscending:NO attributes:attributesToSortBy];
    141. 

  141. }
    142. 

  142. 

  143. + (NSFetchRequest *)createFetchRequestInContext:(NSManagedObjectContext *)context
    144. 

  144. {
    145. 

  145. 	NSFetchRequest *request = [[NSFetchRequest alloc] init];
    146. 

  146. 	[request setEntity:[self entityDescriptionInContext:context]];
    147. 

  147. 	
    148. 

  148. 	return [request autorelease];	
    149. 

  149. }
    150. 

  150. 

  151. + (NSFetchRequest *)createFetchRequest
    152. 

  152. {
    153. 

  153. 	return [self createFetchRequestInContext:[NSManagedObjectContext contextForCurrentThread]];
    154. 

  154. }
    155. 

  155. 

  156. #pragma mark -
    157. 

  157. #pragma mark Number of Entities
    158. 

  158. 

  159. + (NSNumber *) numberOfEntitiesWithContext:(NSManagedObjectContext *)context
    160. 

  160. {
    161. 

  161. 	return [NSNumber numberWithUnsignedInteger:[self countOfEntitiesWithContext:context]];
    162. 

  162. }
    163. 

  163. 

  164. + (NSNumber *)numberOfEntities
    165. 

  165. {
    166. 

  166. 	return [self numberOfEntitiesWithContext:[NSManagedObjectContext contextForCurrentThread]];
    167. 

  167. }
    168. 

  168. 

  169. + (NSNumber *) numberOfEntitiesWithPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    170. 

  170. {
    171. 

  171.     
    172. 

  172. 	return [NSNumber numberWithUnsignedInteger:[self countOfEntitiesWithPredicate:searchTerm inContext:context]];
    173. 

  173. }
    174. 

  174. 

  175. + (NSNumber *) numberOfEntitiesWithPredicate:(NSPredicate *)searchTerm;
    176. 

  176. {
    177. 

  177. 	return [self numberOfEntitiesWithPredicate:searchTerm 
    178. 

  178. 									 inContext:[NSManagedObjectContext contextForCurrentThread]];
    179. 

  179. }
    180. 

  180. 

  181. + (NSUInteger) countOfEntities;
    182. 

  182. {
    183. 

  183.     return [self countOfEntitiesWithContext:[NSManagedObjectContext contextForCurrentThread]];
    184. 

  184. }
    185. 

  185. 

  186. + (NSUInteger) countOfEntitiesWithContext:(NSManagedObjectContext *)context;
    187. 

  187. {
    188. 

  188. 	NSError *error = nil;
    189. 

  189. 	NSUInteger count = [context countForFetchRequest:[self createFetchRequestInContext:context] error:&error];
    190. 

  190. 	[MagicalRecordHelpers handleErrors:error];
    191. 

  191. 	
    192. 

  192.     return count;
    193. 

  193. }
    194. 

  194. 

  195. + (NSUInteger) countOfEntitiesWithPredicate:(NSPredicate *)searchFilter;
    196. 

  196. {
    197. 

  197.     return [self countOfEntitiesWithPredicate:searchFilter inContext:[NSManagedObjectContext defaultContext]];
    198. 

  198. }
    199. 

  199. 

  200. + (NSUInteger) countOfEntitiesWithPredicate:(NSPredicate *)searchFilter inContext:(NSManagedObjectContext *)context;
    201. 

  201. {
    202. 

  202. 	NSError *error = nil;
    203. 

  203. 	NSFetchRequest *request = [self createFetchRequestInContext:context];
    204. 

  204. 	[request setPredicate:searchFilter];
    205. 

  205. 	
    206. 

  206. 	NSUInteger count = [context countForFetchRequest:request error:&error];
    207. 

  207. 	[MagicalRecordHelpers handleErrors:error];
    208. 

  208.  
    209. 

  209.     return count;
    210. 

  210. }
    211. 

  211. 

  212. + (BOOL) hasAtLeastOneEntity
    213. 

  213. {
    214. 

  214.     return [self hasAtLeastOneEntityInContext:[NSManagedObjectContext contextForCurrentThread]];
    215. 

  215. }
    216. 

  216. 

  217. + (BOOL) hasAtLeastOneEntityInContext:(NSManagedObjectContext *)context
    218. 

  218. {
    219. 

  219.     return [[self numberOfEntitiesWithContext:context] intValue] > 0;
    220. 

  220. }
    221. 

  221. 

  222. #pragma mark -
    223. 

  223. #pragma mark Reqest Helpers
    224. 

  224. + (NSFetchRequest *) requestAll
    225. 

  225. {
    226. 

  226. 	return [self createFetchRequestInContext:[NSManagedObjectContext contextForCurrentThread]];
    227. 

  227. }
    228. 

  228. 

  229. + (NSFetchRequest *) requestAllInContext:(NSManagedObjectContext *)context
    230. 

  230. {
    231. 

  231. 	return [self createFetchRequestInContext:context];
    232. 

  232. }
    233. 

  233. 

  234. + (NSFetchRequest *) requestAllWithPredicate:(NSPredicate *)searchTerm;
    235. 

  235. {
    236. 

  236.     return [self requestAllWithPredicate:searchTerm inContext:[NSManagedObjectContext contextForCurrentThread]];
    237. 

  237. }
    238. 

  238. 

  239. + (NSFetchRequest *) requestAllWithPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context;
    240. 

  240. {
    241. 

  241.     NSFetchRequest *request = [self createFetchRequestInContext:context];
    242. 

  242.     [request setPredicate:searchTerm];
    243. 

  243.     
    244. 

  244.     return request;
    245. 

  245. }
    246. 

  246. 

  247. + (NSFetchRequest *) requestAllWhere:(NSString *)property isEqualTo:(id)value
    248. 

  248. {
    249. 

  249.     return [self requestAllWhere:property isEqualTo:value inContext:[NSManagedObjectContext contextForCurrentThread]];
    250. 

  250. }
    251. 

  251. 

  252. + (NSFetchRequest *) requestAllWhere:(NSString *)property isEqualTo:(id)value inContext:(NSManagedObjectContext *)context
    253. 

  253. {
    254. 

  254.     NSFetchRequest *request = [self createFetchRequestInContext:context];
    255. 

  255.     [request setPredicate:[NSPredicate predicateWithFormat:@"%K = %@", property, value]];
    256. 

  256. 

  257.     return request;
    258. 

  258. }
    259. 

  259. 

  260. + (NSFetchRequest *) requestFirstWithPredicate:(NSPredicate *)searchTerm
    261. 

  261. {
    262. 

  262.     return [self requestFirstWithPredicate:searchTerm inContext:[NSManagedObjectContext contextForCurrentThread]];
    263. 

  263. }
    264. 

  264. 

  265. + (NSFetchRequest *) requestFirstWithPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    266. 

  266. {
    267. 

  267.     NSFetchRequest *request = [self createFetchRequestInContext:context];
    268. 

  268.     [request setPredicate:searchTerm];
    269. 

  269.     [request setFetchLimit:1];
    270. 

  270.     
    271. 

  271.     return request;
    272. 

  272. }
    273. 

  273. 

  274. + (NSFetchRequest *) requestFirstByAttribute:(NSString *)attribute withValue:(id)searchValue;
    275. 

  275. {
    276. 

  276.     return [self requestFirstByAttribute:attribute withValue:searchValue inContext:[NSManagedObjectContext contextForCurrentThread]];
    277. 

  277. }
    278. 

  278. 

  279. + (NSFetchRequest *) requestFirstByAttribute:(NSString *)attribute withValue:(id)searchValue inContext:(NSManagedObjectContext *)context;
    280. 

  280. {
    281. 

  281.     NSFetchRequest *request = [self createFetchRequestInContext:context];
    282. 

  282.     [request setFetchLimit:1];
    283. 

  283.     [request setPropertiesToFetch:[NSArray arrayWithObject:attribute]];
    284. 

  284.     [request setPredicate:[NSPredicate predicateWithFormat:@"%K = %@", attribute, searchValue]];
    285. 

  285.     
    286. 

  286.     return request;
    287. 

  287. }
    288. 

  288. 

  289. + (NSFetchRequest *) requestAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context
    290. 

  290. {
    291. 

  291. 	NSFetchRequest *request = [self requestAllInContext:context];
    292. 

  292. 	
    293. 

  293. 	NSSortDescriptor *sortBy = [[[NSSortDescriptor alloc] initWithKey:sortTerm ascending:ascending] autorelease];
    294. 

  294. 	[request setSortDescriptors:[NSArray arrayWithObject:sortBy]];
    295. 

  295. 	
    296. 

  296. 	return request;
    297. 

  297. }
    298. 

  298. 

  299. + (NSFetchRequest *) requestAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending
    300. 

  300. {
    301. 

  301. 	return [self requestAllSortedBy:sortTerm 
    302. 

  302. 						  ascending:ascending
    303. 

  303. 						  inContext:[NSManagedObjectContext contextForCurrentThread]];
    304. 

  304. }
    305. 

  305. 

  306. + (NSFetchRequest *) requestAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    307. 

  307. {
    308. 

  308. 	NSFetchRequest *request = [self requestAllInContext:context];
    309. 

  309. 	[request setPredicate:searchTerm];
    310. 

  310. 	[request setIncludesSubentities:NO];
    311. 

  311. 	[request setFetchBatchSize:[self defaultBatchSize]];
    312. 

  312. 	
    313. 

  313. 	NSSortDescriptor *sortBy = [[[NSSortDescriptor alloc] initWithKey:sortTerm ascending:ascending] autorelease];
    314. 

  314. 	[request setSortDescriptors:[NSArray arrayWithObject:sortBy]];
    315. 

  315. 	
    316. 

  316. 	return request;
    317. 

  317. }
    318. 

  318. 

  319. + (NSFetchRequest *) requestAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm;
    320. 

  320. {
    321. 

  321. 	NSFetchRequest *request = [self requestAllSortedBy:sortTerm 
    322. 

  322. 											 ascending:ascending
    323. 

  323. 										 withPredicate:searchTerm 
    324. 

  324. 											 inContext:[NSManagedObjectContext contextForCurrentThread]];
    325. 

  325. 	return request;
    326. 

  326. }
    327. 

  327. 

  328. 

  329. #pragma mark Finding Data
    330. 

  330. #pragma mark -
    331. 

  331. 

  332. + (NSArray *)findAllInContext:(NSManagedObjectContext *)context
    333. 

  333. {
    334. 

  334. 	return [self executeFetchRequest:[self requestAllInContext:context] inContext:context];	
    335. 

  335. }
    336. 

  336. 

  337. + (NSArray *)findAll
    338. 

  338. {
    339. 

  339. 	return [self findAllInContext:[NSManagedObjectContext contextForCurrentThread]];
    340. 

  340. }
    341. 

  341. 

  342. + (NSArray *)findAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context
    343. 

  343. {
    344. 

  344. 	NSFetchRequest *request = [self requestAllSortedBy:sortTerm ascending:ascending inContext:context];
    345. 

  345. 	
    346. 

  346. 	return [self executeFetchRequest:request inContext:context];
    347. 

  347. }
    348. 

  348. 

  349. + (NSArray *)findAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending
    350. 

  350. {
    351. 

  351. 	return [self findAllSortedBy:sortTerm 
    352. 

  352. 					   ascending:ascending 
    353. 

  353. 					   inContext:[NSManagedObjectContext contextForCurrentThread]];
    354. 

  354. }
    355. 

  355. 

  356. + (NSArray *)findAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    357. 

  357. {
    358. 

  358. 	NSFetchRequest *request = [self requestAllSortedBy:sortTerm 
    359. 

  359. 											 ascending:ascending
    360. 

  360. 										 withPredicate:searchTerm
    361. 

  361. 											 inContext:context];
    362. 

  362. 	
    363. 

  363. 	return [self executeFetchRequest:request inContext:context];
    364. 

  364. }
    365. 

  365. 

  366. + (NSArray *)findAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm
    367. 

  367. {
    368. 

  368. 	return [self findAllSortedBy:sortTerm 
    369. 

  369. 					   ascending:ascending
    370. 

  370. 				   withPredicate:searchTerm 
    371. 

  371. 					   inContext:[NSManagedObjectContext contextForCurrentThread]];
    372. 

  372. }
    373. 

  373. 

  374. #pragma mark -
    375. 

  375. #pragma mark NSFetchedResultsController helpers
    376. 

  376. 

  377. #if TARGET_OS_IPHONE
    378. 

  378. 

  379. + (NSFetchedResultsController *) fetchRequestAllGroupedBy:(NSString *)group withPredicate:(NSPredicate *)searchTerm sortedBy:(NSString *)sortTerm ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context
    380. 

  380. {
    381. 

  381. 	NSString *cacheName = nil;
    382. 

  382. 	#ifdef STORE_USE_CACHE
    383. 

  383. 	cacheName = [NSString stringWithFormat:@"MagicalRecord-Cache-%@", NSStringFromClass(self)];
    384. 

  384. 	#endif
    385. 

  385. 	
    386. 

  386. 	NSFetchRequest *request = [self requestAllSortedBy:sortTerm 
    387. 

  387. 											 ascending:ascending 
    388. 

  388. 										 withPredicate:searchTerm
    389. 

  389. 											 inContext:context];
    390. 

  390. 	
    391. 

  391. 	NSFetchedResultsController *controller = [[NSFetchedResultsController alloc] initWithFetchRequest:request 
    392. 

  392. 																				 managedObjectContext:context
    393. 

  393. 																				   sectionNameKeyPath:group
    394. 

  394. 																							cacheName:cacheName];
    395. 

  395. 	return [controller autorelease];
    396. 

  396. }
    397. 

  397. 

  398. + (NSFetchedResultsController *) fetchRequestAllGroupedBy:(NSString *)group withPredicate:(NSPredicate *)searchTerm sortedBy:(NSString *)sortTerm ascending:(BOOL)ascending 
    399. 

  399. {
    400. 

  400. 	return [self fetchRequestAllGroupedBy:group
    401. 

  401. 							withPredicate:searchTerm
    402. 

  402. 								 sortedBy:sortTerm
    403. 

  403. 								ascending:ascending
    404. 

  404. 								inContext:[NSManagedObjectContext contextForCurrentThread]];
    405. 

  405. }
    406. 

  406. 

  407. + (NSFetchedResultsController *) fetchAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm groupBy:(NSString *)groupingKeyPath inContext:(NSManagedObjectContext *)context
    408. 

  408. {
    409. 

  409. 	NSFetchedResultsController *controller = [self fetchRequestAllGroupedBy:groupingKeyPath 
    410. 

  410. 															  withPredicate:searchTerm
    411. 

  411. 																   sortedBy:sortTerm 
    412. 

  412. 																  ascending:ascending
    413. 

  413. 																  inContext:context];
    414. 

  414. 	
    415. 

  415. 	[self performFetch:controller];
    416. 

  416. 	return controller;
    417. 

  417. }
    418. 

  418. 

  419. + (NSFetchedResultsController *) fetchAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm groupBy:(NSString *)groupingKeyPath
    420. 

  420. {
    421. 

  421. 	return [self fetchAllSortedBy:sortTerm 
    422. 

  422. 						ascending:ascending
    423. 

  423. 					withPredicate:searchTerm 
    424. 

  424. 						  groupBy:groupingKeyPath 
    425. 

  425. 						inContext:[NSManagedObjectContext contextForCurrentThread]];
    426. 

  426. }
    427. 

  427. 

  428. + (NSFetchedResultsController *) fetchRequest:(NSFetchRequest *)request groupedBy:(NSString *)group inContext:(NSManagedObjectContext *)context
    429. 

  429. {
    430. 

  430. 	NSString *cacheName = nil;
    431. 

  431. 	#ifdef STORE_USE_CACHE
    432. 

  432. 	cacheName = [NSString stringWithFormat:@"MagicalRecord-Cache-%@", NSStringFromClass([self class])];
    433. 

  433. 	#endif
    434. 

  434. 	NSFetchedResultsController *controller =
    435. 

  435. 		[[NSFetchedResultsController alloc] initWithFetchRequest:request
    436. 

  436. 											managedObjectContext:context
    437. 

  437. 											  sectionNameKeyPath:group
    438. 

  438. 													   cacheName:cacheName];
    439. 

  439.     [self performFetch:controller];
    440. 

  440. 	return [controller autorelease];
    441. 

  441. }
    442. 

  442. 

  443. + (NSFetchedResultsController *) fetchRequest:(NSFetchRequest *)request groupedBy:(NSString *)group
    444. 

  444. {
    445. 

  445. 	return [self fetchRequest:request 
    446. 

  446. 					groupedBy:group
    447. 

  447. 					inContext:[NSManagedObjectContext contextForCurrentThread]];
    448. 

  448. }
    449. 

  449. #endif
    450. 

  450. 

  451. #pragma mark -
    452. 

  452. 

  453. + (NSArray *)findAllWithPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    454. 

  454. {
    455. 

  455. 	NSFetchRequest *request = [self createFetchRequestInContext:context];
    456. 

  456. 	[request setPredicate:searchTerm];
    457. 

  457. 	
    458. 

  458. 	return [self executeFetchRequest:request 
    459. 

  459. 						   inContext:context];
    460. 

  460. }
    461. 

  461. 

  462. + (NSArray *)findAllWithPredicate:(NSPredicate *)searchTerm
    463. 

  463. {
    464. 

  464. 	return [self findAllWithPredicate:searchTerm 
    465. 

  465. 							inContext:[NSManagedObjectContext contextForCurrentThread]];
    466. 

  466. }
    467. 

  467. 

  468. + (id)findFirstInContext:(NSManagedObjectContext *)context
    469. 

  469. {
    470. 

  470. 	NSFetchRequest *request = [self createFetchRequestInContext:context];
    471. 

  471. 	
    472. 

  472. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    473. 

  473. }
    474. 

  474. 

  475. + (id)findFirst
    476. 

  476. {
    477. 

  477. 	return [self findFirstInContext:[NSManagedObjectContext contextForCurrentThread]];
    478. 

  478. }
    479. 

  479. 

  480. + (id)findFirstByAttribute:(NSString *)attribute withValue:(id)searchValue inContext:(NSManagedObjectContext *)context
    481. 

  481. {	
    482. 

  482. 	NSFetchRequest *request = [self requestFirstByAttribute:attribute withValue:searchValue inContext:context];
    483. 

  483.     [request setPropertiesToFetch:[NSArray arrayWithObject:attribute]];
    484. 

  484.     
    485. 

  485. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    486. 

  486. }
    487. 

  487. 

  488. + (id)findFirstByAttribute:(NSString *)attribute withValue:(id)searchValue
    489. 

  489. {
    490. 

  490. 	return [self findFirstByAttribute:attribute 
    491. 

  491. 							withValue:searchValue 
    492. 

  492. 							inContext:[NSManagedObjectContext contextForCurrentThread]];
    493. 

  493. }
    494. 

  494. 

  495. + (id)findFirstWithPredicate:(NSPredicate *)searchTerm
    496. 

  496. {
    497. 

  497.     return [self findFirstWithPredicate:searchTerm inContext:[NSManagedObjectContext contextForCurrentThread]];
    498. 

  498. }
    499. 

  499. 

  500. + (id)findFirstWithPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    501. 

  501. {
    502. 

  502.     NSFetchRequest *request = [self requestFirstWithPredicate:searchTerm inContext:context];
    503. 

  503.     
    504. 

  504.     return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    505. 

  505. }
    506. 

  506. 

  507. + (id)findFirstWithPredicate:(NSPredicate *)searchterm sortedBy:(NSString *)property ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context
    508. 

  508. {
    509. 

  509. 	NSFetchRequest *request = [self requestAllSortedBy:property ascending:ascending withPredicate:searchterm inContext:context];
    510. 

  510. 

  511. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    512. 

  512. }
    513. 

  513. 

  514. + (id)findFirstWithPredicate:(NSPredicate *)searchterm sortedBy:(NSString *)property ascending:(BOOL)ascending
    515. 

  515. {
    516. 

  516. 	return [self findFirstWithPredicate:searchterm 
    517. 

  517. 							   sortedBy:property 
    518. 

  518. 							  ascending:ascending 
    519. 

  519. 							  inContext:[NSManagedObjectContext contextForCurrentThread]];
    520. 

  520. }
    521. 

  521. 

  522. + (id)findFirstWithPredicate:(NSPredicate *)searchTerm andRetrieveAttributes:(NSArray *)attributes inContext:(NSManagedObjectContext *)context
    523. 

  523. {
    524. 

  524. 	NSFetchRequest *request = [self createFetchRequestInContext:context];
    525. 

  525. 	[request setPredicate:searchTerm];
    526. 

  526. 	[request setPropertiesToFetch:attributes];
    527. 

  527. 	
    528. 

  528. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    529. 

  529. }
    530. 

  530. 

  531. + (id)findFirstWithPredicate:(NSPredicate *)searchTerm andRetrieveAttributes:(NSArray *)attributes
    532. 

  532. {
    533. 

  533. 	return [self findFirstWithPredicate:searchTerm 
    534. 

  534. 				  andRetrieveAttributes:attributes 
    535. 

  535. 							  inContext:[NSManagedObjectContext contextForCurrentThread]];
    536. 

  536. }
    537. 

  537. 

  538. 

  539. + (id) findFirstWithPredicate:(NSPredicate *)searchTerm sortedBy:(NSString *)sortBy ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context andRetrieveAttributes:(id)attributes, ...
    540. 

  540. {
    541. 

  541. 	NSFetchRequest *request = [self requestAllSortedBy:sortBy 
    542. 

  542. 											 ascending:ascending
    543. 

  543. 										 withPredicate:searchTerm
    544. 

  544. 											 inContext:context];
    545. 

  545. 	[request setPropertiesToFetch:[self propertiesNamed:attributes]];
    546. 

  546. 	
    547. 

  547. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    548. 

  548. }
    549. 

  549. 

  550. + (id) findFirstWithPredicate:(NSPredicate *)searchTerm sortedBy:(NSString *)sortBy ascending:(BOOL)ascending andRetrieveAttributes:(id)attributes, ...
    551. 

  551. {
    552. 

  552. 	return [self findFirstWithPredicate:searchTerm
    553. 

  553. 							   sortedBy:sortBy 
    554. 

  554. 							  ascending:ascending 
    555. 

  555. 								inContext:[NSManagedObjectContext contextForCurrentThread]
    556. 

  556. 				  andRetrieveAttributes:attributes];
    557. 

  557. }
    558. 

  558. 

  559. + (NSArray *)findByAttribute:(NSString *)attribute withValue:(id)searchValue inContext:(NSManagedObjectContext *)context
    560. 

  560. {
    561. 

  561. 	NSFetchRequest *request = [self createFetchRequestInContext:context];
    562. 

  562. 	
    563. 

  563. 	[request setPredicate:[NSPredicate predicateWithFormat:@"%K = %@", attribute, searchValue]];
    564. 

  564. 	
    565. 

  565. 	return [self executeFetchRequest:request inContext:context];
    566. 

  566. }
    567. 

  567. 

  568. + (NSArray *)findByAttribute:(NSString *)attribute withValue:(id)searchValue
    569. 

  569. {
    570. 

  570. 	return [self findByAttribute:attribute 
    571. 

  571. 					   withValue:searchValue 
    572. 

  572. 					   inContext:[NSManagedObjectContext contextForCurrentThread]];
    573. 

  573. }
    574. 

  574. 

  575. + (NSArray *)findByAttribute:(NSString *)attribute withValue:(id)searchValue andOrderBy:(NSString *)sortTerm ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context
    576. 

  576. {
    577. 

  577. 	NSPredicate *searchTerm = [NSPredicate predicateWithFormat:@"%K = %@", attribute, searchValue];
    578. 

  578. 	NSFetchRequest *request = [self requestAllSortedBy:sortTerm ascending:ascending withPredicate:searchTerm inContext:context];
    579. 

  579. 	
    580. 

  580. 	return [self executeFetchRequest:request];
    581. 

  581. }
    582. 

  582. 

  583. + (NSArray *)findByAttribute:(NSString *)attribute withValue:(id)searchValue andOrderBy:(NSString *)sortTerm ascending:(BOOL)ascending
    584. 

  584. {
    585. 

  585. 	return [self findByAttribute:attribute 
    586. 

  586. 					   withValue:searchValue
    587. 

  587. 					  andOrderBy:sortTerm 
    588. 

  588. 					   ascending:ascending 
    589. 

  589. 					   inContext:[NSManagedObjectContext contextForCurrentThread]];
    590. 

  590. }
    591. 

  591. 

  592. + (id) createInContext:(NSManagedObjectContext *)context
    593. 

  593. {
    594. 

  594.     if ([self respondsToSelector:@selector(insertInManagedObjectContext:)]) 
    595. 

  595.     {
    596. 

  596.         id entity = [self performSelector:@selector(insertInManagedObjectContext:) withObject:context];
    597. 

  597.         return entity;
    598. 

  598.     }
    599. 

  599.     else
    600. 

  600.     {
    601. 

  601.         NSString *entityName = [self entityName];
    602. 

  602.         
    603. 

  603.         return [NSEntityDescription insertNewObjectForEntityForName:entityName inManagedObjectContext:context];
    604. 

  604.     }
    605. 

  605. }
    606. 

  606. 

  607. + (id)createEntity
    608. 

  608. {	
    609. 

  609. 	NSManagedObject *newEntity = [self createInContext:[NSManagedObjectContext contextForCurrentThread]];
    610. 

  610. 

  611. 	return newEntity;
    612. 

  612. }
    613. 

  613. 

  614. - (BOOL) deleteInContext:(NSManagedObjectContext *)context
    615. 

  615. {
    616. 

  616. 	[context deleteObject:self];
    617. 

  617. 	return YES;
    618. 

  618. }
    619. 

  619. 

  620. - (BOOL) deleteEntity
    621. 

  621. {
    622. 

  622. 	[self deleteInContext:[self managedObjectContext]];
    623. 

  623. 	return YES;
    624. 

  624. }
    625. 

  625. 

  626. + (BOOL) truncateAllInContext:(NSManagedObjectContext *)context
    627. 

  627. {
    628. 

  628.     NSArray *allEntities = [self findAllInContext:context];
    629. 

  629.     for (NSManagedObject *obj in allEntities)
    630. 

  630.     {
    631. 

  631.         [obj deleteInContext:context];
    632. 

  632.     }
    633. 

  633.     return YES;
    634. 

  634. }
    635. 

  635. 

  636. + (BOOL) truncateAll
    637. 

  637. {
    638. 

  638.     [self truncateAllInContext:[NSManagedObjectContext contextForCurrentThread]];
    639. 

  639.     return YES;
    640. 

  640. }
    641. 

  641. 

  642. - (NSNumber *)maxValueFor:(NSString *)property
    643. 

  643. {
    644. 

  644. 	NSManagedObject *obj = [[self class] findFirstByAttribute:property
    645. 

  645. 													withValue:[NSString stringWithFormat:@"max(%@)", property]];
    646. 

  646. 	
    647. 

  647. 	return [obj valueForKey:property];
    648. 

  648. }
    649. 

  649. 

  650. - (id) objectWithMinValueFor:(NSString *)property inContext:(NSManagedObjectContext *)context
    651. 

  651. {
    652. 

  652. 	NSFetchRequest *request = [[self class] createFetchRequestInContext:context];
    653. 

  653. 							   
    654. 

  654. 	NSPredicate *searchFor = [NSPredicate predicateWithFormat:@"SELF = %@ AND %K = min(%@)", self, property, property];
    655. 

  655. 	[request setPredicate:searchFor];
    656. 

  656. 	
    657. 

  657. 	return [[self class] executeFetchRequestAndReturnFirstObject:request inContext:context];
    658. 

  658. }
    659. 

  659. 

  660. - (id) objectWithMinValueFor:(NSString *)property 
    661. 

  661. {
    662. 

  662. 	return [self objectWithMinValueFor:property inContext:[self  managedObjectContext]];
    663. 

  663. }
    664. 

  664. 

  665. 

  666. - (id) inContext:(NSManagedObjectContext*)context 
    667. 

  667. {
    668. 

  668.     NSError *error = nil;
    669. 

  669.     NSManagedObject *inContext = [context existingObjectWithID:[self objectID] error:&error];
    670. 

  670.     [MagicalRecordHelpers handleErrors:error];
    671. 

  671.     
    672. 

  672.     return inContext;
    673. 

  673. }
    674. 

  674. 

  675. - (id) inThreadContext 
    676. 

  676. {
    677. 

  677.     NSManagedObject *weakSelf = self;
    678. 

  678.     return [weakSelf inContext:[NSManagedObjectContext contextForCurrentThread]];
    679. 

  679. }
    680. 

  680. 

  681. @end
    682.