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feat: enable deepDelete config per relation #16

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feat: enable deepDelete config per relation #16

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26 changes: 26 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,32 @@ To use with your Models add the `mixins` attribute to the definition object of y
}
```

If you want a deep delete on some but not on all relation, you can provide an object with the `relation` and the `deepDelete` option into the array. The following uses deep delete on the relation `properties` and not a deep deletion on the relation `description`.

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

**options**

| option | type | description | required |
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24 changes: 15 additions & 9 deletions cascade-delete.js
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Expand Up @@ -40,25 +40,31 @@ module.exports = function (Model, options) {
function cascadeDeletes() {
return _.map(options.relations, function (relation) {
return function (modelId) {
debug('Relation ' + relation + ' model ' + Model.definition.name);
var theRelation = relation;
var theDeepDelete = options.deepDelete;
if (typeof(relation) === 'object') {
theRelation = relation.relation;
theDeepDelete = relation.deepDelete || false;
}
debug('Relation ' + theRelation + ' model ' + Model.definition.name);

if (!Model.relations[relation]) {
debug('Relation ' + relation + ' not found for model ' + Model.definition.name);
throw 'Relation ' + relation + ' not found for model ' + Model.definition.name;
if (!Model.relations[theRelation]) {
debug('Relation ' + theRelation + ' not found for model ' + Model.definition.name);
throw 'Relation ' + theRelation + ' not found for model ' + Model.definition.name;
}


var relationModel = Model.relations[relation].modelTo;
var relationKey = Model.relations[relation].keyTo;
var relationModel = Model.relations[theRelation].modelTo;
var relationKey = Model.relations[theRelation].keyTo;

if (Model.relations[relation].modelThrough) {
relationModel = Model.relations[relation].modelThrough;
if (Model.relations[theRelation].modelThrough) {
relationModel = Model.relations[theRelation].modelThrough;
}

var where = {};
where[relationKey] = modelId;

if (options.deepDelete) {
if (theDeepDelete) {
let relationModelIdName = relationModel.getIdName();
let fields = {};
fields[relationModelIdName] = true;
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