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How to map many to many relationships in angular 7

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0

I'm just setting out on an Angular 7 project and wanted a decent way to join 2 entities together in a linked table. I'm looking at https://www.npmjs.com/package/ngx-treeview which could work but is not ideal because the tree needs to then be iterated to make each currently stored relationship show as checked. This is a slow process on larger trees and I was wondering if there might be a better solution than rendering the tree then iterating the values.

As a brief outline I'm linking products and services with a many to many relationship in EF Core so in the ngx ui for the product I'm listing the services in a tree view which can be checked to add the relationship. It's becoming a bit unwieldy with the shear amount of data.

getTree(): TreeviewItem[] 

 let services = this.servicesService.services$;

 const tree = [];
 services.forEach(s => 

 let c = [
 ];

 s.products.forEach(p => 
 c.push(
 text: p.name + ' - ' + p.id, value: p.id, collapsed: true, checked: false
 );
 );

 const treeItem = new TreeviewItem(
 text: s.name + ' - ' + s.id, value: s.id, children: c, collapsed: true, checked: false
 );

 tree.push(treeItem);
 );
 return tree;

This displays the tree then I have to iterate with

let products = this.productsService.products$;

angular entity-framework .net-core

share|improve this question

edited Mar 23 at 3:47

FRECIA

3,83532640

asked Mar 23 at 1:26

user1919214user1919214

52

add a comment | 

0

I'm just setting out on an Angular 7 project and wanted a decent way to join 2 entities together in a linked table. I'm looking at https://www.npmjs.com/package/ngx-treeview which could work but is not ideal because the tree needs to then be iterated to make each currently stored relationship show as checked. This is a slow process on larger trees and I was wondering if there might be a better solution than rendering the tree then iterating the values.

As a brief outline I'm linking products and services with a many to many relationship in EF Core so in the ngx ui for the product I'm listing the services in a tree view which can be checked to add the relationship. It's becoming a bit unwieldy with the shear amount of data.

getTree(): TreeviewItem[] 

 let services = this.servicesService.services$;

 const tree = [];
 services.forEach(s => 

 let c = [
 ];

 s.products.forEach(p => 
 c.push(
 text: p.name + ' - ' + p.id, value: p.id, collapsed: true, checked: false
 );
 );

 const treeItem = new TreeviewItem(
 text: s.name + ' - ' + s.id, value: s.id, children: c, collapsed: true, checked: false
 );

 tree.push(treeItem);
 );
 return tree;

This displays the tree then I have to iterate with

let products = this.productsService.products$;

angular entity-framework .net-core

share|improve this question

edited Mar 23 at 3:47

FRECIA

3,83532640

asked Mar 23 at 1:26

user1919214user1919214

52

add a comment | 

I'm just setting out on an Angular 7 project and wanted a decent way to join 2 entities together in a linked table. I'm looking at https://www.npmjs.com/package/ngx-treeview which could work but is not ideal because the tree needs to then be iterated to make each currently stored relationship show as checked. This is a slow process on larger trees and I was wondering if there might be a better solution than rendering the tree then iterating the values.

As a brief outline I'm linking products and services with a many to many relationship in EF Core so in the ngx ui for the product I'm listing the services in a tree view which can be checked to add the relationship. It's becoming a bit unwieldy with the shear amount of data.

getTree(): TreeviewItem[] 

 let services = this.servicesService.services$;

 const tree = [];
 services.forEach(s => 

 let c = [
 ];

 s.products.forEach(p => 
 c.push(
 text: p.name + ' - ' + p.id, value: p.id, collapsed: true, checked: false
 );
 );

 const treeItem = new TreeviewItem(
 text: s.name + ' - ' + s.id, value: s.id, children: c, collapsed: true, checked: false
 );

 tree.push(treeItem);
 );
 return tree;

This displays the tree then I have to iterate with

let products = this.productsService.products$;

angular entity-framework .net-core

share|improve this question

edited Mar 23 at 3:47

FRECIA

3,83532640

asked Mar 23 at 1:26

user1919214user1919214

52

getTree(): TreeviewItem[] 

 let services = this.servicesService.services$;

 const tree = [];
 services.forEach(s => 

 let c = [
 ];

 s.products.forEach(p => 
 c.push(
 text: p.name + ' - ' + p.id, value: p.id, collapsed: true, checked: false
 );
 );

 const treeItem = new TreeviewItem(
 text: s.name + ' - ' + s.id, value: s.id, children: c, collapsed: true, checked: false
 );

 tree.push(treeItem);
 );
 return tree;

let products = this.productsService.products$;

angular entity-framework .net-core

angular entity-framework .net-core

share|improve this question

edited Mar 23 at 3:47

FRECIA

3,83532640

asked Mar 23 at 1:26

user1919214user1919214

52

share|improve this question

edited Mar 23 at 3:47

FRECIA

3,83532640

asked Mar 23 at 1:26

user1919214user1919214

52

edited Mar 23 at 3:47

FRECIA

3,83532640

edited Mar 23 at 3:47

FRECIA

3,83532640

asked Mar 23 at 1:26

user1919214user1919214

52

asked Mar 23 at 1:26

user1919214user1919214

52