ios - Multiple NSPredicate -


i'm trying prepare multiple search in coredata entity recipes. there parameters prepare fetch.

recipes attributes:

@property (nonatomic, retain) nsnumber * difficulty; @property (nonatomic, retain) nsstring * name; @property (nonatomic, retain) nsnumber * code; //like identifier @property (nonatomic, retain) nsnumber * preptime;

ingredients separate entity list of ingredients.

join entity contains ingredientcode, recipecode, count.

getarrayofjoindatawithingredients fetches join entity , returns nsarray of codes of recipes contains of input ingredient.

here code:

- (ibaction)callrecipefetch:(id)sender {     nsstring *predicatestring = @"";      nsarray *codes = [[nsarray alloc] init]; codes = nil;     if ([paramcontroller.ingredientsforsearcharray count] > 0) {         nsmutablearray *ingredientsarray = [[nsmutablearray alloc] init];         (ingredients *ingredient in paramcontroller.ingredientsforsearcharray) {             [ingredientsarray addobject:ingredient.code];         }         maintabcontroller *maintabcontroller = [[maintabcontroller alloc] init];         codes = [maintabcontroller getarrayofjoindatawithingredients:ingredientsarray];          nsstring *ingrset = [nsstring stringwithformat:@"(code in %@)", codes];         predicatestring = [predicatestring stringbyappendingstring:ingrset];     }      nsstring *diff;     if ([predicatestring isequaltostring:@""]) {         diff = [nsstring stringwithformat:@"(difficulty <= %d)", paramcontroller.diff.selectedsegmentindex + 1];     }     else diff = [nsstring stringwithformat:@" , (difficulty <= %d)", paramcontroller.diff.selectedsegmentindex + 1];     predicatestring = [predicatestring stringbyappendingstring:diff];      nsstring *timestring = [nsstring stringwithformat:@" , (%d =< preptime) , (preptime <= %d)", paramcontroller.rangeslider.leftvalue, paramcontroller.rangeslider.rightvalue];     predicatestring = [predicatestring stringbyappendingstring:timestring];      if (paramcontroller.categorycode) {         nsstring *categorystring = [nsstring stringwithformat:@" , (incategory = %@)", paramcontroller.categorycode];         predicatestring = [predicatestring stringbyappendingstring:categorystring];     }      nspredicate *predicate = [nspredicate predicatewithformat: predicatestring];     [resultcontroller findrecipeswithpredicate:predicate]; }

the full predicatestring @"(code in (\n 1,\n 3\n)) , (difficulty <= 5) , (0 =< preptime) , (preptime <= 28800) , (incategory = 12)"

now have error in predicate part (code in %@) when prepare nspredicate code:

nspredicate *predicate = [nspredicate predicatewithformat: predicatestring];

error:

terminating app due uncaught exception 'nsinvalidargumentexception', reason: 'unable     parse format string "(code in ( 1, 3 )) , (difficulty <= 5) , (0 =< preptime) , (preptime <= 28800) , (incategory =  12)"'

how correctly make predicate in operator. advices.

use nscompoundpredicate multiple predicates, can refer nscompoundpredicate class reference

something this:

nspredicate * andpredicate = [nscompoundpredicate andpredicatewithsubpredicates:[nsarray arraywithobjects:predicate1,predicate2,predicate3,nil]];

Comments

Post a Comment

Popular posts from this blog

.htaccess - First slash is removed after domain when entering a webpage in the browser -

sometimes when hit address of webpage in browser, removes first slash after domain. examples: www.mywebsite.com/scripts/script_6.php -> trying load www.mywebsite.comscripts/script_6.php www.mywebsite.com/test.php -> trying load www.mywebsite.comtest.php after entering again, loads page. a .htaccess settings must wrong: rewritebase / errordocument 404 http://www.mywebsite.com/oops.php errordocument 401 /notallowed.php rewriteengine on # turn on rewriting engine #gzip <ifmodule mod_deflate.c> addoutputfilterbytype deflate text/text text/html text/plain text/xml text/css application/x- javascript application/javascript </ifmodule> #end gzip rewritecond %{http_host} ^mywebsite\.com rewriterule ^(.*)$ http://www.mywebsite.com$1 [r=permanent,l] directoryindex index6.php rewriterule ^termsofuse/?$ termsofuse.php [nc,l] # handle requests "adpolicy" rewriterule ^privacy-policy/?$ privacy-policy.php [nc,l] # handle requ...
Read more

Automatically create pages in phpfox -

i have array of information of places , wanna use them create multiple pages in phpfox site. first tried manually insert data in phpfox database (in tables of phpfox_pages , phpfox_pages_text ). the page shown in site when opening it's link, site says: the page looking cannot found. do know other tables should manipulate make work? or know plugin phpfox same? thanks, solved ( @purefan guide): "pages" has user if take @ phpfox_user table, you'll found out how fetch new records on that. there 2 ambiguous fields in table ( password & password_salt ). can use script create values fields: <?php function generaterandomstring() { $length = 164; $characters = '-_0123456789abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz'; $randomstring = ''; ($i = 0; $i < $length; $i++) { $randomstring .= $characters[rand(0, strlen($characters) - 1)]; } return $randomstring; } $ssalt = '';...
Read more

c# - Farseer ContactListener is not working -

i'm using farseer in xna project, have trouble contactlistener. created class contactlistener these 2 error messages , don't know how fix problems. the type or namespace name 'contactlistener' not found (are missing using directive or assembly reference?) the type or namespace name 'contactimpulse' not found (are missing using directive or assembly reference?) what wrong contactlistener class? class mycontactlistener: contactlistener { void begincontact(contact contact) { /* handle begin event */ } void endcontact(contact contact) { /* handle end event */ } void presolve(contact contact, ref manifold oldmanifold) { fixture fixturea = contact.fixturea; fixture fixtureb = contact.fixtureb; if (fixtureb.collisioncategories == category.cat10) { contact.enabled = false; } } void postsolve(contact contact, ref contactimpulse impulse) { /* handle post-solve event */ } }...
Read more