NodeJS module that normalize json data types from json schema specifications.
- Convert / Cast Json Node type to another type :
- From Json Schema Specifications
- From Json Path
- Supported types :
stringnumber,integerarraybooleannull
- Json Schema $Ref / Definitions support
Add the latest version of json-node-normalizer to your package.json:
npm install json-node-normalizer --saveconst JsonNodeNormalizer = require('json-node-normalizer');
const normalizedJson = await JsonNodeNormalizer.normalize(jsonData, jsonSchema);We have a json object with incorrect type formats :
const jsonData = {
"fields":{
"id": 123, // Must be a string
"name":"my_name",
"firstName":"firstName",
"age": "31", // Must be a number
"phone": "33600000010", // Must be a number
"orders":{ // Must be an array
"label": "first_order"
},
"externalData": {
"id": "1234"
}, // Must be a null
"active": "true" // Must be a boolean
}
}We want to normalize json object to match with a Json Schema :
const jsonSchema = {
"fields":{
"type":"object",
"properties":{
"id":{
"type": "string"
},
"name":{
"type": "string"
},
"firstName":{
"type": "string"
},
"age":{
"type": "number"
},
"phone":{
"type": "integer"
},
"orders":{
"type": "array",
"items":{
"label":{
"type": "string"
}
}
},
"externalData": {
"type": "null"
},
"active":{
"type": "boolean"
}
}
}
}We can use JsonNodeNormalizer to normalize our json data :
const JsonNodeNormalizer = require('json-node-normalizer');
const result = await JsonNodeNormalizer.normalize(jsonData, jsonSchema);Result :
result = {
"fields":{
"id": "123",
"name": "my_name",
"firstName": "firstName",
"age": 31,
"phone": 33600000010,
"orders":[{
"label": "first_order"
}],
"externalData": null,
"active": true
}
}You can also use normalizePath method if you do not want to use the schema json.
const { JsonNodeNormalizer, NodeTypes } = require('json-node-normalizer');
let normalizedJson = JsonNodeNormalizer.normalizePath(jsonData, '.fields.id', NodeTypes.NUMBER_TYPE);
normalizedJson = JsonNodeNormalizer.normalizePath(jsonData, '.fields.orders', NodeTypes.ARRAY_TYPE);
normalizedJson = JsonNodeNormalizer.normalizePath(jsonData, '.fields.orders[*].label', NodeTypes.STRING_TYPE);
// You can also normalize each element with name 'active' for example...
normalizedJson = JsonNodeNormalizer.normalizePath(jsonData, '..active', NodeTypes.BOOLEAN_TYPE);See https://github.com/json-path/JsonPath for more information about JsonPath expressions.
Log events can have different severity levels - in some cases, you just want to log events with at least a warning level, sometimes log lines have to be more verbose.
Each level is given a specific integer priority. The higher the priority the more important the message is considered to be.
| Level | Priority |
|---|---|
| debug | 4 |
| info (default) | 2 |
| error | 0 |
By default the logging level is set to 'info'.
You can override the logging level by setting the JSON_NODE_NORMALIZER_LOGGING_LEVEL environment variable.