Sequelize Joins between two tables which are associated with third table
I have 3 models in Sequelize : Model User, Model Post and Model Comment.
User Table :
id, displayName
Post Table :
id, userId, value
Comment Table :
id, userId, value
How does one go about creating a join between the Post and Comment Model on the userId column ? I have created associations between User and Post Models and User and Comment Models. But when I try to create a join on Post and Comment Models I get a 'no association found' error. Which is the best way to associate the Post and Comment Model ?
I have seen some posts which say to use 'belongsToMany'
Can I do this since they are both related to User Model?
Post.belongsToMany(Comments, {through: User});
Comments.belongsToMany(Post, {through: User});
Or do I need to create a new model 'UserMaster' which will contain post and comment ids like below?
Post.belongsToMany(Comments, {through: 'UserMaster'});
Comments.belongsToMany(Post, {through: 'UserMaster'});
Thanks in advance
sequelize.js
asked Nov 16 '18 at 8:08
Harsh SaudagarHarsh Saudagar
547
add a comment |
I have 3 models in Sequelize : Model User, Model Post and Model Comment.
User Table :
id, displayName
Post Table :
id, userId, value
Comment Table :
id, userId, value
How does one go about creating a join between the Post and Comment Model on the userId column ? I have created associations between User and Post Models and User and Comment Models. But when I try to create a join on Post and Comment Models I get a 'no association found' error. Which is the best way to associate the Post and Comment Model ?
I have seen some posts which say to use 'belongsToMany'
Can I do this since they are both related to User Model?
Post.belongsToMany(Comments, {through: User});
Comments.belongsToMany(Post, {through: User});
Or do I need to create a new model 'UserMaster' which will contain post and comment ids like below?
Post.belongsToMany(Comments, {through: 'UserMaster'});
Comments.belongsToMany(Post, {through: 'UserMaster'});
Thanks in advance
sequelize.js
asked Nov 16 '18 at 8:08
Harsh SaudagarHarsh Saudagar
547
add a comment |
I have 3 models in Sequelize : Model User, Model Post and Model Comment.
User Table :
id, displayName
Post Table :
id, userId, value
Comment Table :
id, userId, value
How does one go about creating a join between the Post and Comment Model on the userId column ? I have created associations between User and Post Models and User and Comment Models. But when I try to create a join on Post and Comment Models I get a 'no association found' error. Which is the best way to associate the Post and Comment Model ?
I have seen some posts which say to use 'belongsToMany'
Can I do this since they are both related to User Model?
Post.belongsToMany(Comments, {through: User});
Comments.belongsToMany(Post, {through: User});
Or do I need to create a new model 'UserMaster' which will contain post and comment ids like below?
Post.belongsToMany(Comments, {through: 'UserMaster'});
Comments.belongsToMany(Post, {through: 'UserMaster'});
Thanks in advance
sequelize.js
asked Nov 16 '18 at 8:08
Harsh SaudagarHarsh Saudagar
547
I have 3 models in Sequelize : Model User, Model Post and Model Comment.
User Table :
id, displayName
Post Table :
id, userId, value
Comment Table :
id, userId, value
How does one go about creating a join between the Post and Comment Model on the userId column ? I have created associations between User and Post Models and User and Comment Models. But when I try to create a join on Post and Comment Models I get a 'no association found' error. Which is the best way to associate the Post and Comment Model ?
I have seen some posts which say to use 'belongsToMany'
Can I do this since they are both related to User Model?
Post.belongsToMany(Comments, {through: User});
Comments.belongsToMany(Post, {through: User});
Or do I need to create a new model 'UserMaster' which will contain post and comment ids like below?
Post.belongsToMany(Comments, {through: 'UserMaster'});
Comments.belongsToMany(Post, {through: 'UserMaster'});
Thanks in advance
sequelize.js
sequelize.js
asked Nov 16 '18 at 8:08
Harsh SaudagarHarsh Saudagar
547
asked Nov 16 '18 at 8:08
Harsh SaudagarHarsh Saudagar
547
asked Nov 16 '18 at 8:08
Harsh SaudagarHarsh Saudagar
547
asked Nov 16 '18 at 8:08
Harsh SaudagarHarsh Saudagar
547
asked Nov 16 '18 at 8:08
Harsh SaudagarHarsh Saudagar
547
547
add a comment |
add a comment |
0
active
oldest
votes
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
});
}
});
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%2f53333779%2fsequelize-joins-between-two-tables-which-are-associated-with-third-table%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
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.
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%2f53333779%2fsequelize-joins-between-two-tables-which-are-associated-with-third-table%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
