/Source/Categories/NSManagedObject+MagicalRecord.m

https://github.com/zipmark/MagicalRecord · Objective C · 675 lines · 536 code · 135 blank · 4 comment · 10 complexity · 49ac8d21db871e1ceee3e7fa1a8968e9 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. + (void) setDefaultBatchSize:(NSUInteger)newBatchSize
    14. 

  14. {
    15. 

  15. 	@synchronized(self)
    16. 

  16. 	{
    17. 

  17. 		defaultBatchSize = newBatchSize;
    18. 

  18. 	}
    19. 

  19. }
    20. 

  20. 

  21. + (NSUInteger) defaultBatchSize
    22. 

  22. {
    23. 

  23. 	return defaultBatchSize;
    24. 

  24. }
    25. 

  25. 

  26. + (NSArray *) executeFetchRequest:(NSFetchRequest *)request inContext:(NSManagedObjectContext *)context
    27. 

  27. {
    28. 

  28. 	NSError *error = nil;
    29. 

  29. 	
    30. 

  30. 	NSArray *results = [context executeFetchRequest:request error:&error];
    31. 

  31. 	[MagicalRecordHelpers handleErrors:error];
    32. 

  32. 	return results;	
    33. 

  33. }
    34. 

  34. 

  35. + (NSArray *) executeFetchRequest:(NSFetchRequest *)request 
    36. 

  36. {
    37. 

  37. 	return [self executeFetchRequest:request inContext:[NSManagedObjectContext contextForCurrentThread]];
    38. 

  38. }
    39. 

  39. 

  40. + (id) executeFetchRequestAndReturnFirstObject:(NSFetchRequest *)request inContext:(NSManagedObjectContext *)context
    41. 

  41. {
    42. 

  42. 	[request setFetchLimit:1];
    43. 

  43. 	
    44. 

  44. 	NSArray *results = [self executeFetchRequest:request inContext:context];
    45. 

  45. 	if ([results count] == 0)
    46. 

  46. 	{
    47. 

  47. 		return nil;
    48. 

  48. 	}
    49. 

  49. 	return [results objectAtIndex:0];
    50. 

  50. }
    51. 

  51. 

  52. + (id) executeFetchRequestAndReturnFirstObject:(NSFetchRequest *)request
    53. 

  53. {
    54. 

  54. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:[NSManagedObjectContext contextForCurrentThread]];
    55. 

  55. }
    56. 

  56. 

  57. #if TARGET_OS_IPHONE
    58. 

  58. 

  59. + (void) performFetch:(NSFetchedResultsController *)controller
    60. 

  60. {
    61. 

  61. 	NSError *error = nil;
    62. 

  62. 	if (![controller performFetch:&error])
    63. 

  63. 	{
    64. 

  64. 		[MagicalRecordHelpers handleErrors:error];
    65. 

  65. 	}
    66. 

  66. }
    67. 

  67. 

  68. #endif
    69. 

  69. 

  70. + (NSEntityDescription *)entityDescriptionInContext:(NSManagedObjectContext *)context
    71. 

  71. {
    72. 

  72.     if ([self respondsToSelector:@selector(entityInManagedObjectContext:)]) 
    73. 

  73.     {
    74. 

  74.         NSEntityDescription *entity = [self performSelector:@selector(entityInManagedObjectContext:) withObject:context];
    75. 

  75.         return entity;
    76. 

  76.     }
    77. 

  77.     else
    78. 

  78.     {
    79. 

  79.         NSString *entityName = NSStringFromClass([self class]);
    80. 

  80.         return [NSEntityDescription entityForName:entityName inManagedObjectContext:context];
    81. 

  81.     }
    82. 

  82. }
    83. 

  83. 

  84. + (NSEntityDescription *)entityDescription
    85. 

  85. {
    86. 

  86. 	return [self entityDescriptionInContext:[NSManagedObjectContext contextForCurrentThread]];
    87. 

  87. }
    88. 

  88. 

  89. + (NSArray *)propertiesNamed:(NSArray *)properties
    90. 

  90. {
    91. 

  91. 	NSEntityDescription *description = [self entityDescription];
    92. 

  92. 	NSMutableArray *propertiesWanted = [NSMutableArray array];
    93. 

  93. 	
    94. 

  94. 	if (properties)
    95. 

  95. 	{
    96. 

  96. 		NSDictionary *propDict = [description propertiesByName];
    97. 

  97. 		
    98. 

  98. 		for (NSString *propertyName in properties)
    99. 

  99. 		{
    100. 

  100. 			NSPropertyDescription *property = [propDict objectForKey:propertyName];
    101. 

  101. 			if (property)
    102. 

  102. 			{
    103. 

  103. 				[propertiesWanted addObject:property];
    104. 

  104. 			}
    105. 

  105. 			else
    106. 

  106. 			{
    107. 

  107. 				ARLog(@"Property '%@' not found in %@ properties for %@", propertyName, [propDict count], NSStringFromClass(self));
    108. 

  108. 			}
    109. 

  109. 		}
    110. 

  110. 	}
    111. 

  111. 	return propertiesWanted;
    112. 

  112. }
    113. 

  113. 

  114. + (NSArray *) sortAscending:(BOOL)ascending attributes:(NSArray *)attributesToSortBy
    115. 

  115. {
    116. 

  116. 	NSMutableArray *attributes = [NSMutableArray array];
    117. 

  117.     
    118. 

  118.     for (NSString *attributeName in attributesToSortBy) 
    119. 

  119.     {
    120. 

  120.         NSSortDescriptor *sortDescriptor = [[[NSSortDescriptor alloc] initWithKey:attributeName ascending:ascending] autorelease];
    121. 

  121.         [attributes addObject:sortDescriptor];
    122. 

  122.     }
    123. 

  123.     
    124. 

  124. 	return attributes;
    125. 

  125. }
    126. 

  126. 

  127. + (NSArray *) ascendingSortDescriptors:(NSArray *)attributesToSortBy
    128. 

  128. {
    129. 

  129. 	return [self sortAscending:YES attributes:attributesToSortBy];
    130. 

  130. }
    131. 

  131. 

  132. + (NSArray *) descendingSortDescriptors:(NSArray *)attributesToSortBy
    133. 

  133. {
    134. 

  134. 	return [self sortAscending:NO attributes:attributesToSortBy];
    135. 

  135. }
    136. 

  136. 

  137. + (NSFetchRequest *)createFetchRequestInContext:(NSManagedObjectContext *)context
    138. 

  138. {
    139. 

  139. 	NSFetchRequest *request = [[NSFetchRequest alloc] init];
    140. 

  140. 	[request setEntity:[self entityDescriptionInContext:context]];
    141. 

  141. 	
    142. 

  142. 	return [request autorelease];	
    143. 

  143. }
    144. 

  144. 

  145. + (NSFetchRequest *)createFetchRequest
    146. 

  146. {
    147. 

  147. 	return [self createFetchRequestInContext:[NSManagedObjectContext contextForCurrentThread]];
    148. 

  148. }
    149. 

  149. 

  150. #pragma mark -
    151. 

  151. #pragma mark Number of Entities
    152. 

  152. 

  153. + (NSNumber *) numberOfEntitiesWithContext:(NSManagedObjectContext *)context
    154. 

  154. {
    155. 

  155. 	return [NSNumber numberWithUnsignedInteger:[self countOfEntitiesWithContext:context]];
    156. 

  156. }
    157. 

  157. 

  158. + (NSNumber *)numberOfEntities
    159. 

  159. {
    160. 

  160. 	return [self numberOfEntitiesWithContext:[NSManagedObjectContext contextForCurrentThread]];
    161. 

  161. }
    162. 

  162. 

  163. + (NSNumber *) numberOfEntitiesWithPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    164. 

  164. {
    165. 

  165.     
    166. 

  166. 	return [NSNumber numberWithUnsignedInteger:[self countOfEntitiesWithPredicate:searchTerm inContext:context]];
    167. 

  167. }
    168. 

  168. 

  169. + (NSNumber *) numberOfEntitiesWithPredicate:(NSPredicate *)searchTerm;
    170. 

  170. {
    171. 

  171. 	return [self numberOfEntitiesWithPredicate:searchTerm 
    172. 

  172. 									 inContext:[NSManagedObjectContext contextForCurrentThread]];
    173. 

  173. }
    174. 

  174. 

  175. + (NSUInteger) countOfEntities;
    176. 

  176. {
    177. 

  177.     return [self countOfEntitiesWithContext:[NSManagedObjectContext contextForCurrentThread]];
    178. 

  178. }
    179. 

  179. 

  180. + (NSUInteger) countOfEntitiesWithContext:(NSManagedObjectContext *)context;
    181. 

  181. {
    182. 

  182. 	NSError *error = nil;
    183. 

  183. 	NSUInteger count = [context countForFetchRequest:[self createFetchRequestInContext:context] error:&error];
    184. 

  184. 	[MagicalRecordHelpers handleErrors:error];
    185. 

  185. 	
    186. 

  186.     return count;
    187. 

  187. }
    188. 

  188. 

  189. + (NSUInteger) countOfEntitiesWithPredicate:(NSPredicate *)searchFilter;
    190. 

  190. {
    191. 

  191.     return [self countOfEntitiesWithPredicate:searchFilter inContext:[NSManagedObjectContext defaultContext]];
    192. 

  192. }
    193. 

  193. 

  194. + (NSUInteger) countOfEntitiesWithPredicate:(NSPredicate *)searchFilter inContext:(NSManagedObjectContext *)context;
    195. 

  195. {
    196. 

  196. 	NSError *error = nil;
    197. 

  197. 	NSFetchRequest *request = [self createFetchRequestInContext:context];
    198. 

  198. 	[request setPredicate:searchFilter];
    199. 

  199. 	
    200. 

  200. 	NSUInteger count = [context countForFetchRequest:request error:&error];
    201. 

  201. 	[MagicalRecordHelpers handleErrors:error];
    202. 

  202.  
    203. 

  203.     return count;
    204. 

  204. }
    205. 

  205. 

  206. + (BOOL) hasAtLeastOneEntity
    207. 

  207. {
    208. 

  208.     return [self hasAtLeastOneEntityInContext:[NSManagedObjectContext contextForCurrentThread]];
    209. 

  209. }
    210. 

  210. 

  211. + (BOOL) hasAtLeastOneEntityInContext:(NSManagedObjectContext *)context
    212. 

  212. {
    213. 

  213.     return [[self numberOfEntitiesWithContext:context] intValue] > 0;
    214. 

  214. }
    215. 

  215. 

  216. #pragma mark -
    217. 

  217. #pragma mark Reqest Helpers
    218. 

  218. + (NSFetchRequest *) requestAll
    219. 

  219. {
    220. 

  220. 	return [self createFetchRequestInContext:[NSManagedObjectContext contextForCurrentThread]];
    221. 

  221. }
    222. 

  222. 

  223. + (NSFetchRequest *) requestAllInContext:(NSManagedObjectContext *)context
    224. 

  224. {
    225. 

  225. 	return [self createFetchRequestInContext:context];
    226. 

  226. }
    227. 

  227. 

  228. + (NSFetchRequest *) requestAllWithPredicate:(NSPredicate *)searchTerm;
    229. 

  229. {
    230. 

  230.     return [self requestAllWithPredicate:searchTerm inContext:[NSManagedObjectContext contextForCurrentThread]];
    231. 

  231. }
    232. 

  232. 

  233. + (NSFetchRequest *) requestAllWithPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context;
    234. 

  234. {
    235. 

  235.     NSFetchRequest *request = [self createFetchRequestInContext:context];
    236. 

  236.     [request setPredicate:searchTerm];
    237. 

  237.     
    238. 

  238.     return request;
    239. 

  239. }
    240. 

  240. 

  241. + (NSFetchRequest *) requestAllWhere:(NSString *)property isEqualTo:(id)value
    242. 

  242. {
    243. 

  243.     return [self requestAllWhere:property isEqualTo:value inContext:[NSManagedObjectContext contextForCurrentThread]];
    244. 

  244. }
    245. 

  245. 

  246. + (NSFetchRequest *) requestAllWhere:(NSString *)property isEqualTo:(id)value inContext:(NSManagedObjectContext *)context
    247. 

  247. {
    248. 

  248.     NSFetchRequest *request = [self createFetchRequestInContext:context];
    249. 

  249.     [request setPredicate:[NSPredicate predicateWithFormat:@"%K = %@", property, value]];
    250. 

  250. 

  251.     return request;
    252. 

  252. }
    253. 

  253. 

  254. + (NSFetchRequest *) requestFirstWithPredicate:(NSPredicate *)searchTerm
    255. 

  255. {
    256. 

  256.     return [self requestFirstWithPredicate:searchTerm inContext:[NSManagedObjectContext contextForCurrentThread]];
    257. 

  257. }
    258. 

  258. 

  259. + (NSFetchRequest *) requestFirstWithPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    260. 

  260. {
    261. 

  261.     NSFetchRequest *request = [self createFetchRequestInContext:context];
    262. 

  262.     [request setPredicate:searchTerm];
    263. 

  263.     [request setFetchLimit:1];
    264. 

  264.     
    265. 

  265.     return request;
    266. 

  266. }
    267. 

  267. 

  268. + (NSFetchRequest *) requestFirstByAttribute:(NSString *)attribute withValue:(id)searchValue;
    269. 

  269. {
    270. 

  270.     return [self requestFirstByAttribute:attribute withValue:searchValue inContext:[NSManagedObjectContext contextForCurrentThread]];
    271. 

  271. }
    272. 

  272. 

  273. + (NSFetchRequest *) requestFirstByAttribute:(NSString *)attribute withValue:(id)searchValue inContext:(NSManagedObjectContext *)context;
    274. 

  274. {
    275. 

  275.     NSFetchRequest *request = [self createFetchRequestInContext:context];
    276. 

  276.     [request setFetchLimit:1];
    277. 

  277.     [request setPropertiesToFetch:[NSArray arrayWithObject:attribute]];
    278. 

  278.     [request setPredicate:[NSPredicate predicateWithFormat:@"%K = %@", attribute, searchValue]];
    279. 

  279.     
    280. 

  280.     return request;
    281. 

  281. }
    282. 

  282. 

  283. + (NSFetchRequest *) requestAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context
    284. 

  284. {
    285. 

  285. 	NSFetchRequest *request = [self requestAllInContext:context];
    286. 

  286. 	
    287. 

  287. 	NSSortDescriptor *sortBy = [[[NSSortDescriptor alloc] initWithKey:sortTerm ascending:ascending] autorelease];
    288. 

  288. 	[request setSortDescriptors:[NSArray arrayWithObject:sortBy]];
    289. 

  289. 	
    290. 

  290. 	return request;
    291. 

  291. }
    292. 

  292. 

  293. + (NSFetchRequest *) requestAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending
    294. 

  294. {
    295. 

  295. 	return [self requestAllSortedBy:sortTerm 
    296. 

  296. 						  ascending:ascending
    297. 

  297. 						  inContext:[NSManagedObjectContext contextForCurrentThread]];
    298. 

  298. }
    299. 

  299. 

  300. + (NSFetchRequest *) requestAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    301. 

  301. {
    302. 

  302. 	NSFetchRequest *request = [self requestAllInContext:context];
    303. 

  303. 	[request setPredicate:searchTerm];
    304. 

  304. 	[request setIncludesSubentities:NO];
    305. 

  305. 	[request setFetchBatchSize:[self defaultBatchSize]];
    306. 

  306. 	
    307. 

  307. 	NSSortDescriptor *sortBy = [[[NSSortDescriptor alloc] initWithKey:sortTerm ascending:ascending] autorelease];
    308. 

  308. 	[request setSortDescriptors:[NSArray arrayWithObject:sortBy]];
    309. 

  309. 	
    310. 

  310. 	return request;
    311. 

  311. }
    312. 

  312. 

  313. + (NSFetchRequest *) requestAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm;
    314. 

  314. {
    315. 

  315. 	NSFetchRequest *request = [self requestAllSortedBy:sortTerm 
    316. 

  316. 											 ascending:ascending
    317. 

  317. 										 withPredicate:searchTerm 
    318. 

  318. 											 inContext:[NSManagedObjectContext contextForCurrentThread]];
    319. 

  319. 	return request;
    320. 

  320. }
    321. 

  321. 

  322. 

  323. #pragma mark Finding Data
    324. 

  324. #pragma mark -
    325. 

  325. 

  326. + (NSArray *)findAllInContext:(NSManagedObjectContext *)context
    327. 

  327. {
    328. 

  328. 	return [self executeFetchRequest:[self requestAllInContext:context] inContext:context];	
    329. 

  329. }
    330. 

  330. 

  331. + (NSArray *)findAll
    332. 

  332. {
    333. 

  333. 	return [self findAllInContext:[NSManagedObjectContext contextForCurrentThread]];
    334. 

  334. }
    335. 

  335. 

  336. + (NSArray *)findAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context
    337. 

  337. {
    338. 

  338. 	NSFetchRequest *request = [self requestAllSortedBy:sortTerm ascending:ascending inContext:context];
    339. 

  339. 	
    340. 

  340. 	return [self executeFetchRequest:request inContext:context];
    341. 

  341. }
    342. 

  342. 

  343. + (NSArray *)findAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending
    344. 

  344. {
    345. 

  345. 	return [self findAllSortedBy:sortTerm 
    346. 

  346. 					   ascending:ascending 
    347. 

  347. 					   inContext:[NSManagedObjectContext contextForCurrentThread]];
    348. 

  348. }
    349. 

  349. 

  350. + (NSArray *)findAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    351. 

  351. {
    352. 

  352. 	NSFetchRequest *request = [self requestAllSortedBy:sortTerm 
    353. 

  353. 											 ascending:ascending
    354. 

  354. 										 withPredicate:searchTerm
    355. 

  355. 											 inContext:context];
    356. 

  356. 	
    357. 

  357. 	return [self executeFetchRequest:request inContext:context];
    358. 

  358. }
    359. 

  359. 

  360. + (NSArray *)findAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm
    361. 

  361. {
    362. 

  362. 	return [self findAllSortedBy:sortTerm 
    363. 

  363. 					   ascending:ascending
    364. 

  364. 				   withPredicate:searchTerm 
    365. 

  365. 					   inContext:[NSManagedObjectContext contextForCurrentThread]];
    366. 

  366. }
    367. 

  367. 

  368. #pragma mark -
    369. 

  369. #pragma mark NSFetchedResultsController helpers
    370. 

  370. 

  371. #if TARGET_OS_IPHONE
    372. 

  372. 

  373. + (NSFetchedResultsController *) fetchRequestAllGroupedBy:(NSString *)group withPredicate:(NSPredicate *)searchTerm sortedBy:(NSString *)sortTerm ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context
    374. 

  374. {
    375. 

  375. 	NSString *cacheName = nil;
    376. 

  376. 	#ifdef STORE_USE_CACHE
    377. 

  377. 	cacheName = [NSString stringWithFormat:@"MagicalRecord-Cache-%@", NSStringFromClass(self)];
    378. 

  378. 	#endif
    379. 

  379. 	
    380. 

  380. 	NSFetchRequest *request = [self requestAllSortedBy:sortTerm 
    381. 

  381. 											 ascending:ascending 
    382. 

  382. 										 withPredicate:searchTerm
    383. 

  383. 											 inContext:context];
    384. 

  384. 	
    385. 

  385. 	NSFetchedResultsController *controller = [[NSFetchedResultsController alloc] initWithFetchRequest:request 
    386. 

  386. 																				 managedObjectContext:context
    387. 

  387. 																				   sectionNameKeyPath:group
    388. 

  388. 																							cacheName:cacheName];
    389. 

  389. 	return [controller autorelease];
    390. 

  390. }
    391. 

  391. 

  392. + (NSFetchedResultsController *) fetchRequestAllGroupedBy:(NSString *)group withPredicate:(NSPredicate *)searchTerm sortedBy:(NSString *)sortTerm ascending:(BOOL)ascending 
    393. 

  393. {
    394. 

  394. 	return [self fetchRequestAllGroupedBy:group
    395. 

  395. 							withPredicate:searchTerm
    396. 

  396. 								 sortedBy:sortTerm
    397. 

  397. 								ascending:ascending
    398. 

  398. 								inContext:[NSManagedObjectContext contextForCurrentThread]];
    399. 

  399. }
    400. 

  400. 

  401. + (NSFetchedResultsController *) fetchAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm groupBy:(NSString *)groupingKeyPath inContext:(NSManagedObjectContext *)context
    402. 

  402. {
    403. 

  403. 	NSFetchedResultsController *controller = [self fetchRequestAllGroupedBy:groupingKeyPath 
    404. 

  404. 															  withPredicate:searchTerm
    405. 

  405. 																   sortedBy:sortTerm 
    406. 

  406. 																  ascending:ascending
    407. 

  407. 																  inContext:context];
    408. 

  408. 	
    409. 

  409. 	[self performFetch:controller];
    410. 

  410. 	return controller;
    411. 

  411. }
    412. 

  412. 

  413. + (NSFetchedResultsController *) fetchAllSortedBy:(NSString *)sortTerm ascending:(BOOL)ascending withPredicate:(NSPredicate *)searchTerm groupBy:(NSString *)groupingKeyPath
    414. 

  414. {
    415. 

  415. 	return [self fetchAllSortedBy:sortTerm 
    416. 

  416. 						ascending:ascending
    417. 

  417. 					withPredicate:searchTerm 
    418. 

  418. 						  groupBy:groupingKeyPath 
    419. 

  419. 						inContext:[NSManagedObjectContext contextForCurrentThread]];
    420. 

  420. }
    421. 

  421. 

  422. + (NSFetchedResultsController *) fetchRequest:(NSFetchRequest *)request groupedBy:(NSString *)group inContext:(NSManagedObjectContext *)context
    423. 

  423. {
    424. 

  424. 	NSString *cacheName = nil;
    425. 

  425. 	#ifdef STORE_USE_CACHE
    426. 

  426. 	cacheName = [NSString stringWithFormat:@"MagicalRecord-Cache-%@", NSStringFromClass([self class])];
    427. 

  427. 	#endif
    428. 

  428. 	NSFetchedResultsController *controller =
    429. 

  429. 		[[NSFetchedResultsController alloc] initWithFetchRequest:request
    430. 

  430. 											managedObjectContext:context
    431. 

  431. 											  sectionNameKeyPath:group
    432. 

  432. 													   cacheName:cacheName];
    433. 

  433.     [self performFetch:controller];
    434. 

  434. 	return [controller autorelease];
    435. 

  435. }
    436. 

  436. 

  437. + (NSFetchedResultsController *) fetchRequest:(NSFetchRequest *)request groupedBy:(NSString *)group
    438. 

  438. {
    439. 

  439. 	return [self fetchRequest:request 
    440. 

  440. 					groupedBy:group
    441. 

  441. 					inContext:[NSManagedObjectContext contextForCurrentThread]];
    442. 

  442. }
    443. 

  443. #endif
    444. 

  444. 

  445. #pragma mark -
    446. 

  446. 

  447. + (NSArray *)findAllWithPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    448. 

  448. {
    449. 

  449. 	NSFetchRequest *request = [self createFetchRequestInContext:context];
    450. 

  450. 	[request setPredicate:searchTerm];
    451. 

  451. 	
    452. 

  452. 	return [self executeFetchRequest:request 
    453. 

  453. 						   inContext:context];
    454. 

  454. }
    455. 

  455. 

  456. + (NSArray *)findAllWithPredicate:(NSPredicate *)searchTerm
    457. 

  457. {
    458. 

  458. 	return [self findAllWithPredicate:searchTerm 
    459. 

  459. 							inContext:[NSManagedObjectContext contextForCurrentThread]];
    460. 

  460. }
    461. 

  461. 

  462. + (id)findFirstInContext:(NSManagedObjectContext *)context
    463. 

  463. {
    464. 

  464. 	NSFetchRequest *request = [self createFetchRequestInContext:context];
    465. 

  465. 	
    466. 

  466. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    467. 

  467. }
    468. 

  468. 

  469. + (id)findFirst
    470. 

  470. {
    471. 

  471. 	return [self findFirstInContext:[NSManagedObjectContext contextForCurrentThread]];
    472. 

  472. }
    473. 

  473. 

  474. + (id)findFirstByAttribute:(NSString *)attribute withValue:(id)searchValue inContext:(NSManagedObjectContext *)context
    475. 

  475. {	
    476. 

  476. 	NSFetchRequest *request = [self requestFirstByAttribute:attribute withValue:searchValue inContext:context];
    477. 

  477.     [request setPropertiesToFetch:[NSArray arrayWithObject:attribute]];
    478. 

  478.     
    479. 

  479. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    480. 

  480. }
    481. 

  481. 

  482. + (id)findFirstByAttribute:(NSString *)attribute withValue:(id)searchValue
    483. 

  483. {
    484. 

  484. 	return [self findFirstByAttribute:attribute 
    485. 

  485. 							withValue:searchValue 
    486. 

  486. 							inContext:[NSManagedObjectContext contextForCurrentThread]];
    487. 

  487. }
    488. 

  488. 

  489. + (id)findFirstWithPredicate:(NSPredicate *)searchTerm
    490. 

  490. {
    491. 

  491.     return [self findFirstWithPredicate:searchTerm inContext:[NSManagedObjectContext contextForCurrentThread]];
    492. 

  492. }
    493. 

  493. 

  494. + (id)findFirstWithPredicate:(NSPredicate *)searchTerm inContext:(NSManagedObjectContext *)context
    495. 

  495. {
    496. 

  496.     NSFetchRequest *request = [self requestFirstWithPredicate:searchTerm inContext:context];
    497. 

  497.     
    498. 

  498.     return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    499. 

  499. }
    500. 

  500. 

  501. + (id)findFirstWithPredicate:(NSPredicate *)searchterm sortedBy:(NSString *)property ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context
    502. 

  502. {
    503. 

  503. 	NSFetchRequest *request = [self requestAllSortedBy:property ascending:ascending withPredicate:searchterm inContext:context];
    504. 

  504. 

  505. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    506. 

  506. }
    507. 

  507. 

  508. + (id)findFirstWithPredicate:(NSPredicate *)searchterm sortedBy:(NSString *)property ascending:(BOOL)ascending
    509. 

  509. {
    510. 

  510. 	return [self findFirstWithPredicate:searchterm 
    511. 

  511. 							   sortedBy:property 
    512. 

  512. 							  ascending:ascending 
    513. 

  513. 							  inContext:[NSManagedObjectContext contextForCurrentThread]];
    514. 

  514. }
    515. 

  515. 

  516. + (id)findFirstWithPredicate:(NSPredicate *)searchTerm andRetrieveAttributes:(NSArray *)attributes inContext:(NSManagedObjectContext *)context
    517. 

  517. {
    518. 

  518. 	NSFetchRequest *request = [self createFetchRequestInContext:context];
    519. 

  519. 	[request setPredicate:searchTerm];
    520. 

  520. 	[request setPropertiesToFetch:attributes];
    521. 

  521. 	
    522. 

  522. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    523. 

  523. }
    524. 

  524. 

  525. + (id)findFirstWithPredicate:(NSPredicate *)searchTerm andRetrieveAttributes:(NSArray *)attributes
    526. 

  526. {
    527. 

  527. 	return [self findFirstWithPredicate:searchTerm 
    528. 

  528. 				  andRetrieveAttributes:attributes 
    529. 

  529. 							  inContext:[NSManagedObjectContext contextForCurrentThread]];
    530. 

  530. }
    531. 

  531. 

  532. 

  533. + (id) findFirstWithPredicate:(NSPredicate *)searchTerm sortedBy:(NSString *)sortBy ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context andRetrieveAttributes:(id)attributes, ...
    534. 

  534. {
    535. 

  535. 	NSFetchRequest *request = [self requestAllSortedBy:sortBy 
    536. 

  536. 											 ascending:ascending
    537. 

  537. 										 withPredicate:searchTerm
    538. 

  538. 											 inContext:context];
    539. 

  539. 	[request setPropertiesToFetch:[self propertiesNamed:attributes]];
    540. 

  540. 	
    541. 

  541. 	return [self executeFetchRequestAndReturnFirstObject:request inContext:context];
    542. 

  542. }
    543. 

  543. 

  544. + (id) findFirstWithPredicate:(NSPredicate *)searchTerm sortedBy:(NSString *)sortBy ascending:(BOOL)ascending andRetrieveAttributes:(id)attributes, ...
    545. 

  545. {
    546. 

  546. 	return [self findFirstWithPredicate:searchTerm
    547. 

  547. 							   sortedBy:sortBy 
    548. 

  548. 							  ascending:ascending 
    549. 

  549. 								inContext:[NSManagedObjectContext contextForCurrentThread]
    550. 

  550. 				  andRetrieveAttributes:attributes];
    551. 

  551. }
    552. 

  552. 

  553. + (NSArray *)findByAttribute:(NSString *)attribute withValue:(id)searchValue inContext:(NSManagedObjectContext *)context
    554. 

  554. {
    555. 

  555. 	NSFetchRequest *request = [self createFetchRequestInContext:context];
    556. 

  556. 	
    557. 

  557. 	[request setPredicate:[NSPredicate predicateWithFormat:@"%K = %@", attribute, searchValue]];
    558. 

  558. 	
    559. 

  559. 	return [self executeFetchRequest:request inContext:context];
    560. 

  560. }
    561. 

  561. 

  562. + (NSArray *)findByAttribute:(NSString *)attribute withValue:(id)searchValue
    563. 

  563. {
    564. 

  564. 	return [self findByAttribute:attribute 
    565. 

  565. 					   withValue:searchValue 
    566. 

  566. 					   inContext:[NSManagedObjectContext contextForCurrentThread]];
    567. 

  567. }
    568. 

  568. 

  569. + (NSArray *)findByAttribute:(NSString *)attribute withValue:(id)searchValue andOrderBy:(NSString *)sortTerm ascending:(BOOL)ascending inContext:(NSManagedObjectContext *)context
    570. 

  570. {
    571. 

  571. 	NSPredicate *searchTerm = [NSPredicate predicateWithFormat:@"%K = %@", attribute, searchValue];
    572. 

  572. 	NSFetchRequest *request = [self requestAllSortedBy:sortTerm ascending:ascending withPredicate:searchTerm inContext:context];
    573. 

  573. 	
    574. 

  574. 	return [self executeFetchRequest:request];
    575. 

  575. }
    576. 

  576. 

  577. + (NSArray *)findByAttribute:(NSString *)attribute withValue:(id)searchValue andOrderBy:(NSString *)sortTerm ascending:(BOOL)ascending
    578. 

  578. {
    579. 

  579. 	return [self findByAttribute:attribute 
    580. 

  580. 					   withValue:searchValue
    581. 

  581. 					  andOrderBy:sortTerm 
    582. 

  582. 					   ascending:ascending 
    583. 

  583. 					   inContext:[NSManagedObjectContext contextForCurrentThread]];
    584. 

  584. }
    585. 

  585. 

  586. + (id) createInContext:(NSManagedObjectContext *)context
    587. 

  587. {
    588. 

  588.     if ([self respondsToSelector:@selector(insertInManagedObjectContext:)]) 
    589. 

  589.     {
    590. 

  590.         id entity = [self performSelector:@selector(insertInManagedObjectContext:) withObject:context];
    591. 

  591.         return entity;
    592. 

  592.     }
    593. 

  593.     else
    594. 

  594.     {
    595. 

  595.         NSString *entityName = NSStringFromClass([self class]);
    596. 

  596.         return [NSEntityDescription insertNewObjectForEntityForName:entityName inManagedObjectContext:context];
    597. 

  597.     }
    598. 

  598. }
    599. 

  599. 

  600. + (id)createEntity
    601. 

  601. {	
    602. 

  602. 	NSManagedObject *newEntity = [self createInContext:[NSManagedObjectContext contextForCurrentThread]];
    603. 

  603. 

  604. 	return newEntity;
    605. 

  605. }
    606. 

  606. 

  607. - (BOOL) deleteInContext:(NSManagedObjectContext *)context
    608. 

  608. {
    609. 

  609. 	[context deleteObject:self];
    610. 

  610. 	return YES;
    611. 

  611. }
    612. 

  612. 

  613. - (BOOL) deleteEntity
    614. 

  614. {
    615. 

  615. 	[self deleteInContext:[self managedObjectContext]];
    616. 

  616. 	return YES;
    617. 

  617. }
    618. 

  618. 

  619. + (BOOL) truncateAllInContext:(NSManagedObjectContext *)context
    620. 

  620. {
    621. 

  621.     NSArray *allEntities = [self findAllInContext:context];
    622. 

  622.     for (NSManagedObject *obj in allEntities)
    623. 

  623.     {
    624. 

  624.         [obj deleteInContext:context];
    625. 

  625.     }
    626. 

  626.     return YES;
    627. 

  627. }
    628. 

  628. 

  629. + (BOOL) truncateAll
    630. 

  630. {
    631. 

  631.     [self truncateAllInContext:[NSManagedObjectContext contextForCurrentThread]];
    632. 

  632.     return YES;
    633. 

  633. }
    634. 

  634. 

  635. - (NSNumber *)maxValueFor:(NSString *)property
    636. 

  636. {
    637. 

  637. 	NSManagedObject *obj = [[self class] findFirstByAttribute:property
    638. 

  638. 													withValue:[NSString stringWithFormat:@"max(%@)", property]];
    639. 

  639. 	
    640. 

  640. 	return [obj valueForKey:property];
    641. 

  641. }
    642. 

  642. 

  643. - (id) objectWithMinValueFor:(NSString *)property inContext:(NSManagedObjectContext *)context
    644. 

  644. {
    645. 

  645. 	NSFetchRequest *request = [[self class] createFetchRequestInContext:context];
    646. 

  646. 							   
    647. 

  647. 	NSPredicate *searchFor = [NSPredicate predicateWithFormat:@"SELF = %@ AND %K = min(%@)", self, property, property];
    648. 

  648. 	[request setPredicate:searchFor];
    649. 

  649. 	
    650. 

  650. 	return [[self class] executeFetchRequestAndReturnFirstObject:request inContext:context];
    651. 

  651. }
    652. 

  652. 

  653. - (id) objectWithMinValueFor:(NSString *)property 
    654. 

  654. {
    655. 

  655. 	return [self objectWithMinValueFor:property inContext:[self  managedObjectContext]];
    656. 

  656. }
    657. 

  657. 

  658. 

  659. - (id) inContext:(NSManagedObjectContext*)context 
    660. 

  660. {
    661. 

  661.     NSError *error = nil;
    662. 

  662.     NSManagedObject *inContext = [context existingObjectWithID:[self objectID] error:&error];
    663. 

  663.     [MagicalRecordHelpers handleErrors:error];
    664. 

  664.     
    665. 

  665.     return inContext;
    666. 

  666. }
    667. 

  667. 

  668. - (id) inThreadContext 
    669. 

  669. {
    670. 

  670.     NSManagedObject *weakSelf = self;
    671. 

  671.     return [weakSelf inContext:[NSManagedObjectContext contextForCurrentThread]];
    672. 

  672. }
    673. 

  673. 

  674. @end
    675.