You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
3.3 KiB
96 lines
3.3 KiB
3 years ago
|
# json-schema-traverse
|
||
|
|
Traverse JSON Schema passing each schema object to callback
|
||
|
|
|
||
|
|
[](https://github.com/epoberezkin/json-schema-traverse/actions?query=workflow%3Abuild)
|
||
|
|
[](https://www.npmjs.com/package/json-schema-traverse)
|
||
|
|
[](https://coveralls.io/github/epoberezkin/json-schema-traverse?branch=master)
|
||
|
|
|
||
|
|
|
||
|
|
## Install
|
||
|
|
|
||
|
|
```
|
||
|
|
npm install json-schema-traverse
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
```javascript
|
||
|
|
const traverse = require('json-schema-traverse');
|
||
|
|
const schema = {
|
||
|
|
properties: {
|
||
|
|
foo: {type: 'string'},
|
||
|
|
bar: {type: 'integer'}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
traverse(schema, {cb});
|
||
|
|
// cb is called 3 times with:
|
||
|
|
// 1. root schema
|
||
|
|
// 2. {type: 'string'}
|
||
|
|
// 3. {type: 'integer'}
|
||
|
|
|
||
|
|
// Or:
|
||
|
|
|
||
|
|
traverse(schema, {cb: {pre, post}});
|
||
|
|
// pre is called 3 times with:
|
||
|
|
// 1. root schema
|
||
|
|
// 2. {type: 'string'}
|
||
|
|
// 3. {type: 'integer'}
|
||
|
|
//
|
||
|
|
// post is called 3 times with:
|
||
|
|
// 1. {type: 'string'}
|
||
|
|
// 2. {type: 'integer'}
|
||
|
|
// 3. root schema
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
Callback function `cb` is called for each schema object (not including draft-06 boolean schemas), including the root schema, in pre-order traversal. Schema references ($ref) are not resolved, they are passed as is. Alternatively, you can pass a `{pre, post}` object as `cb`, and then `pre` will be called before traversing child elements, and `post` will be called after all child elements have been traversed.
|
||
|
|
|
||
|
|
Callback is passed these parameters:
|
||
|
|
|
||
|
|
- _schema_: the current schema object
|
||
|
|
- _JSON pointer_: from the root schema to the current schema object
|
||
|
|
- _root schema_: the schema passed to `traverse` object
|
||
|
|
- _parent JSON pointer_: from the root schema to the parent schema object (see below)
|
||
|
|
- _parent keyword_: the keyword inside which this schema appears (e.g. `properties`, `anyOf`, etc.)
|
||
|
|
- _parent schema_: not necessarily parent object/array; in the example above the parent schema for `{type: 'string'}` is the root schema
|
||
|
|
- _index/property_: index or property name in the array/object containing multiple schemas; in the example above for `{type: 'string'}` the property name is `'foo'`
|
||
|
|
|
||
|
|
|
||
|
|
## Traverse objects in all unknown keywords
|
||
|
|
|
||
|
|
```javascript
|
||
|
|
const traverse = require('json-schema-traverse');
|
||
|
|
const schema = {
|
||
|
|
mySchema: {
|
||
|
|
minimum: 1,
|
||
|
|
maximum: 2
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
traverse(schema, {allKeys: true, cb});
|
||
|
|
// cb is called 2 times with:
|
||
|
|
// 1. root schema
|
||
|
|
// 2. mySchema
|
||
|
|
```
|
||
|
|
|
||
|
|
Without option `allKeys: true` callback will be called only with root schema.
|
||
|
|
|
||
|
|
|
||
|
|
## Enterprise support
|
||
|
|
|
||
|
|
json-schema-traverse package is a part of [Tidelift enterprise subscription](https://tidelift.com/subscription/pkg/npm-json-schema-traverse?utm_source=npm-json-schema-traverse&utm_medium=referral&utm_campaign=enterprise&utm_term=repo) - it provides a centralised commercial support to open-source software users, in addition to the support provided by software maintainers.
|
||
|
|
|
||
|
|
|
||
|
|
## Security contact
|
||
|
|
|
||
|
|
To report a security vulnerability, please use the
|
||
|
|
[Tidelift security contact](https://tidelift.com/security).
|
||
|
|
Tidelift will coordinate the fix and disclosure. Please do NOT report security vulnerability via GitHub issues.
|
||
|
|
|
||
|
|
|
||
|
|
## License
|
||
|
|
|
||
|
|
[MIT](https://github.com/epoberezkin/json-schema-traverse/blob/master/LICENSE)
|