Graphs

Examples GitHub Atmosphere.js

Oriented graph methods with shema and restrictions.

Install

meteor add shuttler:graphs

Required

• shuttler:ref

Example

var a = new Mongo.Collection('a');
var a1 = a.insert({ _id: 'a1' });
var a2 = a.insert({ _id: 'a2' );

var b = new Mongo.Collection('b');
b.attachGraph();
b.link.insert(a1, a2); // ~"b1"
b.link.find.to(a2); // { _id: "b1", _source: { id: 'a1', collection: 'a' }, _target: { id: 'a1', collection: 'a' } }
b1.source() // { _id: 'a1' }

Documentation

Methods

collection.attachGraph

(options?: Options)

Attach to the collection, all methods and all helpers.

Add to collection collection.isGraph = true;.

Options

schema

Boolean

Allows to forbid automatic attach scheme.

collection.attachGraph({ schema: false });

collection.link.insert

(source: Document|Ref, target: Document|Ref, customFields: Object, callback?: Function) => id: String

collection.link.update

(link: Document|Ref|String, source: Document|Ref, target: Document|Ref, customUpdateQuery: Object, callback?: Function) => count: Number

collection.link.update.source

(link: Document|Ref|String, source: Document|Ref, customUpdateQuery: Object, callback?: Function) => count: Number

Aliases

• collection.link.update.from

collection.link.update.target

(link: Document|Ref|String, target: Document|Ref, customUpdateQuery: Object, callback?: Function) => count: Number

Aliases

• collection.link.update.to

collection.link.find

(source: Document|Ref|(id: String), target: Document|Ref|(id: String), query: Object, options: Object) => Document|undefined

Aliases

• collection.link.findOne collection.links.findOne

collection.link.find.target

(target: Document|Ref|(id: String), query: Object, options: Object) => Document|undefined

Aliases

• collection.*.*.to

collection.link.find.source

(source: Document|Ref|(id: String), query: Object, options: Object) => Document|undefined

Aliases

• collection.*.*.from

collection.links.find

(source: Document|Ref|(id: String), target: Document|Ref|(id: String), query: Object, options: Object) => Cursor

collection.links.find.target

(target: Document|Ref|(id: String), query: Object, options: Object) => Cursor

Aliases

• collection.*.*.to

collection.links.find.source

(source: Document|Ref|(id: String), query: Object, options: Object) => Cursor

Aliases

• collection.*.*.from

Hooks

Used package matb33:collection-hooks.

Available field this.action containing insert update or remove. Available fields this.sourceChanged: Boolean and this.targetChanged: Boolean.

collection.after.link

(handler: (userId, unlinked?, linked, fieldNames, modifier, options) => void)

unlinked is defined only on update.

Wrapper around matb33:collection-hooks .after.update and .after.insert.

collection.after.unlink

(handler: (userId, unlinked, linked?, fieldNames, modifier, options) => void)

linked is defined only on update.

Wrapper around matb33:collection-hooks .after.update and .after.remove.

collection.after.link.source

(handler: (userId, unlinked?, linked, fieldNames, modifier, options) => void)

collection.after.link.target

(handler: (userId, unlinked?, linked, fieldNames, modifier, options) => void)

collection.after.unlink.source

(handler: (userId, unlinked, linked?, fieldNames, modifier, options) => void)

collection.after.unlink.target

(handler: (userId, unlinked, linked?, fieldNames, modifier, options) => void)

Helpers

Used package dburles:collection-helpers.

document.source

() => Document|undefined

document.target

() => Document|undefined

Restrictions

Used package ivansglazunov:restrict.

Add new restriction checks. In the case of operation insert the arguments fieldNames and modifier are not exists. Available argument action containing insert update or remove.

handler: (userId, doc, fieldNames, modifier, action) => Boolean

collection.allow({
    'link': function(userId, doc, fieldNames, modifier, action) {
    	return true;
    },
    'link.source': function(userId, doc, fieldNames, modifier, action) {
    	return true;
    },
    'link.target': function(userId, doc, fieldNames, modifier, action) {
    	return true;
    },
    'unlink': function(userId, doc, fieldNames, modifier, action) {
    	return true;
    },
    'unlink.source': function(userId, doc, fieldNames, modifier, action) {
    	return true;
    },
    'unlink.target': function(userId, doc, fieldNames, modifier, action) {
    	return true;
    }
});
collection.deny({
    'link': function(userId, doc, fieldNames, modifier, action) {
    	return false;
    },
    'link.source': function(userId, doc, fieldNames, modifier, action) {
    	return false;
    },
    'link.target': function(userId, doc, fieldNames, modifier, action) {
    	return false;
    },
    'unlink': function(userId, doc, fieldNames, modifier, action) {
    	return false;
    },
    'unlink.source': function(userId, doc, fieldNames, modifier, action) {
    	return false;
    },
    'unlink.target': function(userId, doc, fieldNames, modifier, action) {
    	return false;
    }
});

Methods

Shuttler.getSelectorByDirection

(direction: 'source'|'target'|'link', link: Document|Ref) => Object

test = Mongo.Collection('test');
test.attachGraph();
test.insert({ _id: '2' });
test.insert({ _id: '3' });
test.link.insert(test.findOne('2'), test.findOne('3'), { _id: '1' });
Shuttler.getSelectorByDirection('source', test.findOne('1'));
// { '_source.collection': 'test', '_source.id': '3' }
Shuttler.getSelectorByDirection('link', test.findOne('1'));
// { '_id': '1' }

Shuttler.getRefByDirection

(direction: 'source'|'target'|'link', link: Document|Ref) => Object

test = Mongo.Collection('test');
test.attachGraph();
test.insert({ _id: '2' });
test.insert({ _id: '3' });
test.link.insert(test.findOne('2'), test.findOne('3'), { _id: '1' });
Shuttler.getRefByDirection('source', test.findOne('1'));
// { collection: 'test', id: '2' }
Shuttler.getRefByDirection('link', test.findOne('1'));
// { collection: 'test', id: '1' }

Shuttler.getDocumentByDirection

(direction: 'source'|'target'|'link', link: Document|Ref) => Object

test = Mongo.Collection('test');
test.attachGraph();
test.insert({ _id: '2' });
test.insert({ _id: '3' });
test.link.insert(test.findOne('2'), test.findOne('3'), { _id: '1' });
Shuttler.getRefByDirection('source', test.findOne('1'));
// { _id: '2' }
Shuttler.getRefByDirection('link', test.findOne('1'));
// {  _id: '1', _source: { collection: 'test', id: '2' }, _target: { collection: 'test', id: '3' } }

Schemas

Shuttler.GraphSidesSchema

Source code

Shuttler.GraphDirectionSchema

Source code

Shuttler.GraphDirectionsSchema

Source code

Versions

0.0.17

• Fix .link.update arguments bug.

0.0.16

• collection.attachGraph options argument with schema option.

0.0.14

• Added .link.update.to .link.update.target .link.update.from``.link.update.source

0.0.12

• Document transformation on .after hooks.
• Fix .link.find.* methods.

0.0.9

• New syntax of hooks with unlinked and linked variables.
• Little fixes

0.0.8

• Support for ivansglazunov:[email protected]
• Direction and sides schemas and methods.

0.0.6

• Hot fix imposition of prototypes on the server

0.0.5

• Add support collection-hooks fetchPrevious
• Add aliases

0.0.4

• Add .after.link.source, .after.link.target, .after.unlink.source, .after.unlink.target
• Add to after handler this.sourceChanged and this.targetChanged

0.0.3

• Rename .insert.link argument query to customFields