ios - Core Data error message -

-

i created core data entity named: "athlete".

here error getting:

terminating app due uncaught exception 'nsinvalidargumentexception', reason: '+entityforname: nil not legal nsmanagedobjectcontext parameter searching entity name 'athlete''

this line @ breaks:

athlete *detail = [nsentitydescription insertnewobjectforentityforname:@"athlete" inmanagedobjectcontext:context];

delegate.h

@property (readonly, strong, nonatomic) nsmanagedobjectcontext *managedobjectcontext; @property (readonly, strong, nonatomic) nsmanagedobjectmodel *managedobjectmodel; @property (readonly, strong, nonatomic) nspersistentstorecoordinator *persistentstorecoordinator;

delegate.m

-(void)createdata{      nsmanagedobjectcontext *context = [self managedobjectcontext];      athlete *detail = [nsentitydescription insertnewobjectforentityforname:@"athlete" inmanagedobjectcontext:context];      detail.first = @"joe";      detail.last = @"pastrami";      detail.phone = @"(123)456-7891";      nserror *error;      if(![context save:&error]){         nslog(@"error :(");     }      nsfetchrequest *request = [[nsfetchrequest alloc] init];      nsentitydescription *entity = [nsentitydescription entityforname:@"athlete" inmanagedobjectcontext:context];      [request setentity:entity];      nsarray *arr = [context executefetchrequest:request error:&error];      (athlete *ath in arr){         nslog(@"name %@", ath.first);     }  }    - (bool)application:(uiapplication *)application didfinishlaunchingwithoptions:(nsdictionary *)launchoptions {     [self createdata]; }

the error says all: managedobjectcontext nil.


Comments

Post a Comment

Popular posts from this blog

c# - must be a non-abstract type with a public parameterless constructor in redis -

-
when save object, got below error must non-abstract type public parameterless constructor in order use parameter 't' in generic type or method 'servicestack.redis.redisclient.store<t>(t) redisclass.getinstnace().store(msg); // error here redisclass.getinstnace().save(); as third party's class, can not edit how save object? could create wrapper around third party object call constructor, store wrapper? e.g. public class mywrapper { public thirdpartyobject thirdpartyinstance { get; set; } public mywrapper() { thirdpartyinstance = new thirdpartyobject("constructors"); } }
Read more

c# - ReportViewer control - axd url -

-
i've embedded microsoft.reporting.webforms.reportviewer control in aspx. site works on mysite.com. when try exmple export report, there new black window opened address mysite.com/reserved.reportviewerwebcontrol.axd... it's working fine. but.. pass axd via proxy. mean, i'd force export use url myproxy.mysite.com/reserved.reportviewerwebcontrol.axd... redirect request mysite.com/reserved.reportviewerwebcontrol.axd... i've noticed, link build within js (that inlcuded in axd): exportreport: function(format) { if (this.exporturlbase == null) return false; window.open(this.exporturlbase + encodeuricomponent(format), "_blank"); return true; }, the url axd stored in exporturlbase . how can change proxy serwer url? it possible modify exporturlbase field in javascript. report stored in placeholder somewhere on page, once found can create call _getinternalviewer() function on gain access exporturlbase. have @ following code: ...
Read more

time series - R growth rate calculation week over week on daily timeseries data -

-
i'm trying calculate w/w growth rates entirely in r. use excel, or preprocess ruby, that's not point. data.frame example date gpv type 1 2013-04-01 12900 office 2 2013-04-02 16232 office 3 2013-04-03 10035 office i want factored 'type' , need wrap date type column weeks. , calculate week on week growth. i think need ddply group week - custom function determines if date in given week or not? then, after that, use diff , find growth b/w weeks divided previous week. then i'll plot week/week growths, or use data.frame export it. this closed had same useful ideas. update: answer ggplot: all same below, use instead of plot ggplot(data.frame(week=seq(length(gr)), gr), aes(x=week,y=gr*100)) + geom_point() + geom_smooth(method='loess') + coord_cartesian(xlim = c(.95, 10.05)) + scale_x_discrete() + ggtitle('week on week growth rate, apr 1') + ylab('growth rate %') (old, correct answer using plot) w...
Read more