JSORM the isomorphic, framework-agnostic Javascript ORM
Dirty Tracking
When an attribute has been modified, but has not yet been saved to the
server, it is considered “dirty”. Use #isDirty() to see if any attribute is dirty, use the #changes() method to see all dirty attributes.
Typescript
Javascript
let post = await Post.first()
post.title // "original"
post.isDirty() // false
post.changes() // {}
post.title = "changed"
post.isDirty() // true
post.changes() // { title: ["original", "changed"] }
await post.save()
post.isDirty() // false
post.changes() // {}
Post.first().then(function(response) {
var post = response.data;
post.title; // "original"
post.isDirty(); // false
post.changes(); // {}
post.title = "changed";
post.isDirty(); // true
post.changes(); // { title: ["original", "changed"] }
post.save().then(function(success) { // true
post.isDirty(); // false
post.changes(); // {}
});
});
Remember, only dirty attributes are sent to the server when
#save()is called.
#isDirty() can take into account relationships - just pass a
string, array, or object or relationship names. A relationship is
considered dirty if:
- Any objects in the relationship have dirty attributes
- An object was removed from a
hasManyrelationship - An object was added to a
hasManyrelationship - Any object within the relationship was replaced with a different object.
Typescript
Javascript
let post = await Post.first()
post.comments[0].text = "my comment"
post.isDirty("comments") // true
post = await Post.first()
post.comments.push(new Comment())
post.isDirty("comments") // true
post = await Post.first()
post.comments.splice(1, 1)
post.isDirty("comments") // true
post = await Post.first()
post.blog // an existing Blog instance
post.blog = (await Blog.first()).data
post.isDirty("blog") // true
// check nested relationships
post.isDirty(["blog", { comments: "author" }])
Post.first().then(function(response) {
var post = response.data;
post.comments[0].text = "my comment";
post.isDirty("comments"); // true
});
Post.first().then(function(response) {
var post = response.data;
post.comments.push(new Comment());
post.isDirty("comments"); // true
});
Post.first().then(function(response) {
var post = response.data;
post.comments.splice(1, 1);
post.isDirty("comments"); // true
});
Post.first().then(function(response) {
var post = response.data;
post.blog; // an existing Blog instance
Blog.first().then(function(blog) {
post.blog = (await Blog.first()).data
post.isDirty("blog") // true
});
});
// check nested relationships
post.isDirty(["blog", { comments: "author" }])