How to set primary key in Core Database?
Multi tool use
0
How to make two primary keys in CoreData , i have two rows ,
School Name and Student registration number , where Two rows can't be same with same Same school name and same registration number .
I am not able to find , how to make any primary key in coreData ?
ios swift core-data
asked Nov 28 '18 at 16:35
RoshniRoshni
165
add a comment |
0
How to make two primary keys in CoreData , i have two rows ,
School Name and Student registration number , where Two rows can't be same with same Same school name and same registration number .
I am not able to find , how to make any primary key in coreData ?
ios swift core-data
asked Nov 28 '18 at 16:35
RoshniRoshni
165
Don't think of Core Data as a database because it isn't. It's a persistence framework which can use SQLite, but that backing storage is not exclusive (it can store info in XML and even binary files). What you need to do is to manage your entities in your object graph. You should never care about the persistence details of Core Data.
– Andy Ibanez
Nov 28 '18 at 17:07
So i have to use SQLite Directly ?? how can i do this task .... @AndyIbanez
– Roshni
Nov 28 '18 at 17:46
Do you just need CoreData to enforce that the values are unique? stackoverflow.com/questions/21130427/…
– Craig Siemens
Nov 28 '18 at 18:01
Also, you don't have "rows" in Core Data. It sounds like you have (at least) 2 entities;SchoolandStudent. The student entity would have a reference to the school object
– Paulw11
Nov 28 '18 at 19:54
stackoverflow.com/a/32814593/9250889 @AndyIbanez i think this will solve my problem right ?
– Roshni
Dec 6 '18 at 13:01
add a comment |
0
0
0
How to make two primary keys in CoreData , i have two rows ,
School Name and Student registration number , where Two rows can't be same with same Same school name and same registration number .
I am not able to find , how to make any primary key in coreData ?
ios swift core-data
asked Nov 28 '18 at 16:35
RoshniRoshni
165
How to make two primary keys in CoreData , i have two rows ,
School Name and Student registration number , where Two rows can't be same with same Same school name and same registration number .
I am not able to find , how to make any primary key in coreData ?
ios swift core-data
ios swift core-data
asked Nov 28 '18 at 16:35
RoshniRoshni
165
asked Nov 28 '18 at 16:35
RoshniRoshni
165
asked Nov 28 '18 at 16:35
RoshniRoshni
165
asked Nov 28 '18 at 16:35
RoshniRoshni
165
asked Nov 28 '18 at 16:35
RoshniRoshni
165
165
Don't think of Core Data as a database because it isn't. It's a persistence framework which can use SQLite, but that backing storage is not exclusive (it can store info in XML and even binary files). What you need to do is to manage your entities in your object graph. You should never care about the persistence details of Core Data.
– Andy Ibanez
Nov 28 '18 at 17:07
So i have to use SQLite Directly ?? how can i do this task .... @AndyIbanez
– Roshni
Nov 28 '18 at 17:46
Do you just need CoreData to enforce that the values are unique? stackoverflow.com/questions/21130427/…
– Craig Siemens
Nov 28 '18 at 18:01
Also, you don't have "rows" in Core Data. It sounds like you have (at least) 2 entities;SchoolandStudent. The student entity would have a reference to the school object
– Paulw11
Nov 28 '18 at 19:54
stackoverflow.com/a/32814593/9250889 @AndyIbanez i think this will solve my problem right ?
– Roshni
Dec 6 '18 at 13:01
add a comment |
Don't think of Core Data as a database because it isn't. It's a persistence framework which can use SQLite, but that backing storage is not exclusive (it can store info in XML and even binary files). What you need to do is to manage your entities in your object graph. You should never care about the persistence details of Core Data.
– Andy Ibanez
Nov 28 '18 at 17:07
So i have to use SQLite Directly ?? how can i do this task .... @AndyIbanez
– Roshni
Nov 28 '18 at 17:46
Do you just need CoreData to enforce that the values are unique? stackoverflow.com/questions/21130427/…
– Craig Siemens
Nov 28 '18 at 18:01
Also, you don't have "rows" in Core Data. It sounds like you have (at least) 2 entities;SchoolandStudent. The student entity would have a reference to the school object
– Paulw11
Nov 28 '18 at 19:54
stackoverflow.com/a/32814593/9250889 @AndyIbanez i think this will solve my problem right ?
– Roshni
Dec 6 '18 at 13:01
Don't think of Core Data as a database because it isn't. It's a persistence framework which can use SQLite, but that backing storage is not exclusive (it can store info in XML and even binary files). What you need to do is to manage your entities in your object graph. You should never care about the persistence details of Core Data.
– Andy Ibanez
Nov 28 '18 at 17:07
Don't think of Core Data as a database because it isn't. It's a persistence framework which can use SQLite, but that backing storage is not exclusive (it can store info in XML and even binary files). What you need to do is to manage your entities in your object graph. You should never care about the persistence details of Core Data.
– Andy Ibanez
Nov 28 '18 at 17:07
So i have to use SQLite Directly ?? how can i do this task .... @AndyIbanez
– Roshni
Nov 28 '18 at 17:46
So i have to use SQLite Directly ?? how can i do this task .... @AndyIbanez
– Roshni
Nov 28 '18 at 17:46
Do you just need CoreData to enforce that the values are unique? stackoverflow.com/questions/21130427/…
– Craig Siemens
Nov 28 '18 at 18:01
Do you just need CoreData to enforce that the values are unique? stackoverflow.com/questions/21130427/…
– Craig Siemens
Nov 28 '18 at 18:01
Also, you don't have "rows" in Core Data. It sounds like you have (at least) 2 entities;
School and Student. The student entity would have a reference to the school object– Paulw11
Nov 28 '18 at 19:54
Also, you don't have "rows" in Core Data. It sounds like you have (at least) 2 entities;
School and Student. The student entity would have a reference to the school object– Paulw11
Nov 28 '18 at 19:54
stackoverflow.com/a/32814593/9250889 @AndyIbanez i think this will solve my problem right ?
– Roshni
Dec 6 '18 at 13:01
stackoverflow.com/a/32814593/9250889 @AndyIbanez i think this will solve my problem right ?
– Roshni
Dec 6 '18 at 13:01
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53524142%2fhow-to-set-primary-key-in-core-database%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53524142%2fhow-to-set-primary-key-in-core-database%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
er,1ZPXhU Y25octtNuu,hpMK2So3spj1Q J,9ZH8JCBBm6ng,jTiOObG,ClGO9c1,D1yttZ,ZxuXXgOoKNjA,T
Don't think of Core Data as a database because it isn't. It's a persistence framework which can use SQLite, but that backing storage is not exclusive (it can store info in XML and even binary files). What you need to do is to manage your entities in your object graph. You should never care about the persistence details of Core Data.
– Andy Ibanez
Nov 28 '18 at 17:07
So i have to use SQLite Directly ?? how can i do this task .... @AndyIbanez
– Roshni
Nov 28 '18 at 17:46
Do you just need CoreData to enforce that the values are unique? stackoverflow.com/questions/21130427/…
– Craig Siemens
Nov 28 '18 at 18:01
Also, you don't have "rows" in Core Data. It sounds like you have (at least) 2 entities;
SchoolandStudent. The student entity would have a reference to the school object– Paulw11
Nov 28 '18 at 19:54
stackoverflow.com/a/32814593/9250889 @AndyIbanez i think this will solve my problem right ?
– Roshni
Dec 6 '18 at 13:01