cascade-delete-mixin


##### IMPORTANT! Mixin object structure is changed. If you use "relationsConfig" key, please use 1.3.1 version
``bash
npm install --save loopback-cascade-delete-mixin@1.3.1
`
##### or change object structure! (see below)


This module is designed for the Strongloop Loopback framework. It provides cascade delete with a simple configuration on your models.

install

`bash
npm install --save loopback-cascade-delete-mixin
`
Node.js v. > 6

mixinsources

Add the mixins property to your server/model-config.json like the following:

`json
{
"_meta": {
"sources": [
"loopback/common/models",
"loopback/server/models",
"../common/models",
"./models"
],
"mixins": [
"loopback/common/mixins",
"../node_modules/loopback-cascade-delete-mixin",
"../common/mixins"
]
}
}
`

config

To use with your Models add the mixins attribute to the definition object of your model config.

`json
{
"name": "Product",
"properties": {
"name": {
"type": "string",
}
},
"relations": {
"properties": {
"type": "hasMany",
"model": "Property",
"foreignKey": ""
},
"description": {
"type": "hasMany",
"model": "Property",
"foreignKey": ""
}
},
"mixins": {
"CascadeDelete": {
"relations":
["properties",
{"name": "description", "deepDelete": false}],
"deepDelete": true,
}
}
}
`

options

| option | type | description | required |
| ------ | ---- | ----------- | -------- |
|relations| [String] or [Object] | relations which you want to delete together with current model, see object keys below | true |
|deepDelete| [Boolean] | enable or disable the deep delete function. If activated, the CascadeDelete will be executed on the deleted related models as well (if they have the CascadeDelete mixin specified). If not used, disable it for performance matters | false |


relations object

| key | type | description | required |
| ------ | ---- | ----------- | -------- |
|name| [String] | relation name | true |
|deepDelete| [Boolean] | enable or disable the deep delete function for current relation. If activated, the CascadeDelete will be executed on the deleted related models as well (if they have the CascadeDelete mixin specified). If not used, disable it for performance matters | false |
|foreignKey| [String] | custom foreign key | false |

tests

Run the tests:
`bash
npm test
`
Run with debugging output on:

`bash
DEBUG='loopback:mixins:cascade-delete' npm test
``