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service-rule-parser

v2.2.0

Published

> 业务规则解析器,PM 可以用类似于 SQL 的语句编写业务规则,负责解析成 JSON 格式的规则声明。

Readme

service-rule-parser

业务规则解析器,PM 可以用类似于 SQL 的语句编写业务规则,负责解析成 JSON 格式的规则声明。

由于依赖包的限制,SQL 解析的时候不支持字段和条件名的大写,建议使用 snake_case,否则会导致解析出来的字段匹配不上。

Installation

$ npm install --save service-rule-parser

Usage

const parser = require('service-rule-parser');

// 1 condition, 1 operation
const result = parser.parse('SET maxfee=8000 WHERE car_price=10');
// result: { operation: { maxfee: 8000 }, conditions: { car_price: { eq: 10 } } };

// 2 condition, 1 operation
const result = parser.parse('SET maxfee=8000 WHERE car_price<10 AND car_pric>5');
// result: { operation: { maxfee: 8000 }, conditions: { car_price: { lt: 10, gt: 5 } } };

// or condition, 1 operation,注意 condition 变成数组了
const result = parser.parse('SET maxfee=8000 WHERE car_price<10 OR newcar_price>5');
// result: { operation: { maxfee: 8000 }, conditions: [{ car_price: { lt: 10 } }, { newcar_price: { gt: 5 } } ] };

License

MIT © wangshijun