Does the first instance of a model have an id of 0 or 1?












0















I'm wondering if the very first instance of a model has an id of 0 or 1?



I'm interested in default functionality for PostgreSQL and SQLite.



Thanks!






django django-models







share|improve this question




















  • 1





    That depends, strictly speaking, on the underlying database. For most databases it is 1. It is an AutoField, and the ids are assigned by the database, in some databases, like PostgreSQL, you can provide it a different sequence, and thus dispatch ids in a totally different way. But it is typically a bad idea to "work with these ids". Personally I think it is better to see ids as "blackbox" identifiers, where the content/type/... is unknown.

    – Willem Van Onsem
    Jan 2 at 20:01













  • Sorry. I should have been more clear. I'm interested in SQLLite and PostgreSQL databases. Thanks!

    – Jason Howard
    Jan 2 at 20:05
















0















I'm wondering if the very first instance of a model has an id of 0 or 1?



I'm interested in default functionality for PostgreSQL and SQLite.



Thanks!






django django-models







share|improve this question




















  • 1





    That depends, strictly speaking, on the underlying database. For most databases it is 1. It is an AutoField, and the ids are assigned by the database, in some databases, like PostgreSQL, you can provide it a different sequence, and thus dispatch ids in a totally different way. But it is typically a bad idea to "work with these ids". Personally I think it is better to see ids as "blackbox" identifiers, where the content/type/... is unknown.

    – Willem Van Onsem
    Jan 2 at 20:01













  • Sorry. I should have been more clear. I'm interested in SQLLite and PostgreSQL databases. Thanks!

    – Jason Howard
    Jan 2 at 20:05














0












0








0








I'm wondering if the very first instance of a model has an id of 0 or 1?



I'm interested in default functionality for PostgreSQL and SQLite.



Thanks!






django django-models







share|improve this question
















I'm wondering if the very first instance of a model has an id of 0 or 1?



I'm interested in default functionality for PostgreSQL and SQLite.



Thanks!






django django-models




django django-models






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Jan 2 at 20:12







Jason Howard

















asked Jan 2 at 20:00









Jason HowardJason Howard

318112




318112








  • 1





    That depends, strictly speaking, on the underlying database. For most databases it is 1. It is an AutoField, and the ids are assigned by the database, in some databases, like PostgreSQL, you can provide it a different sequence, and thus dispatch ids in a totally different way. But it is typically a bad idea to "work with these ids". Personally I think it is better to see ids as "blackbox" identifiers, where the content/type/... is unknown.

    – Willem Van Onsem
    Jan 2 at 20:01













  • Sorry. I should have been more clear. I'm interested in SQLLite and PostgreSQL databases. Thanks!

    – Jason Howard
    Jan 2 at 20:05














  • 1





    That depends, strictly speaking, on the underlying database. For most databases it is 1. It is an AutoField, and the ids are assigned by the database, in some databases, like PostgreSQL, you can provide it a different sequence, and thus dispatch ids in a totally different way. But it is typically a bad idea to "work with these ids". Personally I think it is better to see ids as "blackbox" identifiers, where the content/type/... is unknown.

    – Willem Van Onsem
    Jan 2 at 20:01













  • Sorry. I should have been more clear. I'm interested in SQLLite and PostgreSQL databases. Thanks!

    – Jason Howard
    Jan 2 at 20:05








1




1





That depends, strictly speaking, on the underlying database. For most databases it is 1. It is an AutoField, and the ids are assigned by the database, in some databases, like PostgreSQL, you can provide it a different sequence, and thus dispatch ids in a totally different way. But it is typically a bad idea to "work with these ids". Personally I think it is better to see ids as "blackbox" identifiers, where the content/type/... is unknown.

– Willem Van Onsem
Jan 2 at 20:01







That depends, strictly speaking, on the underlying database. For most databases it is 1. It is an AutoField, and the ids are assigned by the database, in some databases, like PostgreSQL, you can provide it a different sequence, and thus dispatch ids in a totally different way. But it is typically a bad idea to "work with these ids". Personally I think it is better to see ids as "blackbox" identifiers, where the content/type/... is unknown.

– Willem Van Onsem
Jan 2 at 20:01















Sorry. I should have been more clear. I'm interested in SQLLite and PostgreSQL databases. Thanks!

– Jason Howard
Jan 2 at 20:05





Sorry. I should have been more clear. I'm interested in SQLLite and PostgreSQL databases. Thanks!

– Jason Howard
Jan 2 at 20:05












1 Answer
1






active

oldest

votes


















1














Both SQLite and PostgreSQL use 1 as the default starting point for auto-increment style indicies (assuming an increasing value).



From the SQLite docs on autoincrement:




If the table is initially empty, then a ROWID of 1 is used.




From the PostgreSQL docs on sequences:




The optional clause MINVALUE minvalue determines the minimum value a sequence can generate. If this clause is not supplied or NO MINVALUE is specified, then defaults will be used. The defaults are 1 and -2^63 - 1 for ascending and descending sequences, respectively.







share|improve this answer
























  • thanks for the info!

    – Jason Howard
    Jan 2 at 22:13












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


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f54012424%2fdoes-the-first-instance-of-a-model-have-an-id-of-0-or-1%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown

























1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









1














Both SQLite and PostgreSQL use 1 as the default starting point for auto-increment style indicies (assuming an increasing value).



From the SQLite docs on autoincrement:




If the table is initially empty, then a ROWID of 1 is used.




From the PostgreSQL docs on sequences:




The optional clause MINVALUE minvalue determines the minimum value a sequence can generate. If this clause is not supplied or NO MINVALUE is specified, then defaults will be used. The defaults are 1 and -2^63 - 1 for ascending and descending sequences, respectively.







share|improve this answer
























  • thanks for the info!

    – Jason Howard
    Jan 2 at 22:13
















1














Both SQLite and PostgreSQL use 1 as the default starting point for auto-increment style indicies (assuming an increasing value).



From the SQLite docs on autoincrement:




If the table is initially empty, then a ROWID of 1 is used.




From the PostgreSQL docs on sequences:




The optional clause MINVALUE minvalue determines the minimum value a sequence can generate. If this clause is not supplied or NO MINVALUE is specified, then defaults will be used. The defaults are 1 and -2^63 - 1 for ascending and descending sequences, respectively.







share|improve this answer
























  • thanks for the info!

    – Jason Howard
    Jan 2 at 22:13














1












1








1







Both SQLite and PostgreSQL use 1 as the default starting point for auto-increment style indicies (assuming an increasing value).



From the SQLite docs on autoincrement:




If the table is initially empty, then a ROWID of 1 is used.




From the PostgreSQL docs on sequences:




The optional clause MINVALUE minvalue determines the minimum value a sequence can generate. If this clause is not supplied or NO MINVALUE is specified, then defaults will be used. The defaults are 1 and -2^63 - 1 for ascending and descending sequences, respectively.







share|improve this answer













Both SQLite and PostgreSQL use 1 as the default starting point for auto-increment style indicies (assuming an increasing value).



From the SQLite docs on autoincrement:




If the table is initially empty, then a ROWID of 1 is used.




From the PostgreSQL docs on sequences:




The optional clause MINVALUE minvalue determines the minimum value a sequence can generate. If this clause is not supplied or NO MINVALUE is specified, then defaults will be used. The defaults are 1 and -2^63 - 1 for ascending and descending sequences, respectively.








share|improve this answer












share|improve this answer



share|improve this answer










answered Jan 2 at 20:17









Jonah BishopJonah Bishop

9,07433357




9,07433357













  • thanks for the info!

    – Jason Howard
    Jan 2 at 22:13



















  • thanks for the info!

    – Jason Howard
    Jan 2 at 22:13

















thanks for the info!

– Jason Howard
Jan 2 at 22:13





thanks for the info!

– Jason Howard
Jan 2 at 22:13




















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














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f54012424%2fdoes-the-first-instance-of-a-model-have-an-id-of-0-or-1%23new-answer', 'question_page');
}
);

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







Popular posts from this blog

MongoDB - Not Authorized To Execute Command

Image
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box; } 0 I have successfully enabled authorization on MongoDB and I have created an account on the admin database and then I created an account for my database called test. The following connection string to connect to my test database works successfully: mongo --host 192.168.17.52 --port 27017 -u user1 -p password --authenticationDatabase test Only problem I have now is, I cannot execute commands such as: show dbs. I get the following error when I try to do so: "errmsg" : "not authorized on admin to execute command { listDatabases: 1.0, lsid: { id: UUID("a1d5bc0d-bc58-485e-b232-270758a89455") }, $db: "admin...
Read more

Npm cannot find a required file even through it is in the searched directory

Image
up vote 0 down vote favorite I got that error: users-Air:pdfuploader user$ npm run start client@0.1.0 start /Users/user/Documents/pdfuploader react-scripts start Could not find a required file. Name: index.html Searched in: /Users/user/Documents/pdfuploader/public npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! client@0.1.0 start: `react-scripts start` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the client@0.1.0 start script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above. npm ERR! A complete log of this run can be found in: npm ERR! /Users/user/.npm/_logs/2018-11-19T10_19_14_555Z-debug.log users-Air:pdfuploader user$ And the file is in /Users/user/Documents/pdfuploader/public as you can see in my github repository: https://github.c...
Read more

in spring boot 2.1 many test slices are not allowed anymore due to multiple @BootstrapWith

Image
1 I tried to upgrade a yummy sandwich made of two test slices (@JsonTest and @JdbcTest in my case, crunchy test code in between) adding spring boot 2.1 flavour to it. But it seems it was not much of a success. I cannot annotate my tests with many @...Test since they are now each bringing their own XxxTestContextBootstrapper. It used to work when they all used same SpringBootTestContextBootstrapper. @RunWith(SpringRunner.class) @JdbcTest @JsonTest public class Test { @Test public void test() { System.out.printn("Hello, World !"); } } The error I get from BootstrapUtils is illegalStateException : Configuration error: found multiple declarations of @BootstrapWith for test class I understand I might be doing something wrong here but is there an easy way I could load both Json and Jdbc contex...
Read more