waterline-criteria-test
v2.0.2
Published
Utility library for working with Waterline criterias. Especially useful when building Sails adapters for key/value databases.
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waterline-criteria
Utilities for working with Waterline criterias, especially for applying them to in-memory datasets.
This module was designed for adapters which communicate with key/value stores such as
sails-disk
, sails-memory, and sails-redis (i.e. they already implement thesemantic
interface, but need to implement thequeryable
interface).
Installation
$ npm install waterline-criteria --save
Filtering an array
Filter an array of dictionaries.
var WLCriteria = require('waterline-criteria');
var results = WLCriteria(dataset, criteria);
| | Argument | Type | Details | |---|:-------------------------- | ------------------------------ |:----------------------------------------------------------------- | | 1 | dataset | ((array)) | An array of dictionaries to filter/sort. | 2 | criteria | ((dictionary)) | A Waterline criteria dictionary. See Concepts > Models & ORM > Query Language for more information.
Returns a filtered result set.
Example
var WLCriteria = require('waterline-criteria');
var SOME_DATASET = [
{
id: 1,
name: 'Lyra'
},
{
id: 2,
name 'larry'
}
];
// Filter dataset.
var results = WLCriteria(SOME_DATASET, {
where: {
name: { contains: 'lyr' }
}
}).results;
// x ==> [{name: 'Lyra', id: 1}]
.validateWhereClause()
Check a where
clause for obviously unsupported usage.
This does not do any schema-aware validation-- its job is merely to check for structural issues, and to provide a better experience when integrating from userland code.
var WLCriteria = require('waterline-criteria');
try {
WLCriteria.validateWhereClause(where);
} catch (e) {
switch (e.code) {
case 'E_WHERE_CLAUSE_UNPARSEABLE':
// ...
break;
default: throw e;
}
}
// ...
| | Argument | Type | Details |
|---|:-------------------------- | ------------------- |:----------------------------------------------------------------- |
| 1 | where | ((dictionary)) | A hypothetically well-formed where
clause from a Waterline criteria.
If
where
clause cannot be parsed, throws an Error with a code property of'E_WHERE_CLAUSE_UNPARSEABLE'
.
.validateSortClause()
Check a sort
clause for obviously unsupported usage.
This does not do any schema-aware validation-- its job is merely to check for structural issues, and to provide a better experience when integrating from userland code.
var WLCriteria = require('waterline-criteria');
try {
WLCriteria.validateSortClause(sort);
} catch (e) {
switch (e.code) {
case 'E_SORT_CLAUSE_UNPARSEABLE':
// ...
break;
default: throw e;
}
}
// ...
| | Argument | Type | Details |
|---|:-------------------------- | ------------------------------ |:----------------------------------------------------------------- |
| 1 | sort | ((dictionary)) or ((string)) | A hypothetically well-formed sort
clause from a Waterline criteria.
If
sort
clause cannot be parsed, throws an Error with a code property of'E_SORT_CLAUSE_UNPARSEABLE'
.
Bugs
To report a bug, click here.
This is a built-in module in the Sails framework and the
sails-disk
adapter. It is installed automatically when you runnpm install sails
.
Version notes
The master branch of this repository holds waterline-criteria
used in Sails versions 0.10.0 and up. If you're looking for the version for the v0.9.x releases of Sails, the source is located here.
Contributing
Please observe the guidelines and conventions laid out in the Sails project contribution guide when opening issues or submitting pull requests.
License
The Sails framework is free and open-source under the MIT License.