Comments (2)
No, there's no explicit change in the support for relations. However, dexie can be used that way anyway, just like with SQL with full consistency - it's just that one need to manage foreign keys consistency "manually". One way of doing that is to provide a service with methods to control deletion of objects. One can also use en entity class with methods to add and manage related entities.
Following the newly updated docs for using dexie with typescript
// SchoolClass.ts
export class SchoolClass extends Entity<AppDB> {
class_id!: string;
class_name!: string;
delete() {
return this.db.transaction('rw', db.classes, db.student_classes, db.instructor_classes, () => {
db.student_classes.where({classId: this.class_id}).delete();
db.instructor_classes.where({classId: this.class_id}).delete();
db.classes.delete(this.class_id);
});
}
}
// Student.ts
export class Student extends Entity<AppDB> {
student_id!: string;
student_name!: string;
delete() {
return this.db.transaction('rw', db.students, db.student_classes, db.instructor_classes, () => {
db.student_classes.where({student_id: this.student_id}).delete();
db.instructor_classes.where({student_id: this.student_id}).delete();
db.students.delete(this.student_id);
});
}
}
// AppDB.ts
export class AppDB extends Dexie {
students!: EntityTable<Student, 'student_id'>;
classes!: EntityTable<SchoolClass, 'class_id'>;
...
}
The point is, those operations that need to take care of managing related entities could be written in either a service method or an entity method. Other simpler operations, such as adding new entities or updating student_name etc might not need a service or entity method, but that is a matter of taste.
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Thanks!
Some sort of native support for relational tables would be really cool. Of course, once you start down the rabbit hole of supporting "simple" joins you'd be asked to build a whole ORM.
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Related Issues (20)
- Seeking Guidance for Serverless Bi-directional Sync Between Two Dexie.js Instances HOT 7
- Dexie Cloud Feature request: user-specific public realm
- Is it possible to invite a user who is not signed up? HOT 6
- Error: too much recursion HOT 1
- Typescript returns errors regarding ID that is undefined HOT 11
- bulkDelete() for large number of primary keys is way too slow
- WebPush for DexieCloud Feature Request
- Dexie Cloud feature request: in-app invitations HOT 1
- dexie cloud db entries with image blob disapear HOT 2
- Return only one field?
- Typescript complain with compound ID HOT 2
- Dexie Cloud Manager - "Manage users" error HOT 3
- Authentication error with the fresh.deno framework HOT 1
- Issue with Dexie's table.where() Method when Targeting Existing IndexedDB with Indexed KeyPath
- "default" is not exported by "../../../Dexie.js/dist/dexie.min.js", imported by "../../../Dexie.js/import-wrapper-prod.mjs". HOT 14
- Transaction context is lost when running a recursive call in a loop HOT 8
- Backwards compatibility issue - ReferenceError: queueMicrotask is not defined HOT 2
- circularly reference on update HOT 10
- dexie-cloud feature request: Transaction support on REST API HOT 3
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