97 lines
3.2 KiB
TypeScript
97 lines
3.2 KiB
TypeScript
import { filter } from '../src/index.ts';
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const users = [
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{
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metadata: {
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tags: ['premium', 'active'],
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type: 'user',
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region: 'beijing',
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created_at: '2024-03-15T10:00:00Z'
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}
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},
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{
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metadata: {
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tags: ['free'],
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type: 'admin',
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region: 'shanghai',
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created_at: '2024-01-10T09:00:00Z'
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}
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},
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{
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metadata: {
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tags: ['enterprise', 'premium'],
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type: 'user',
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region: 'guangzhou',
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created_at: '2024-04-05T12:00:00Z'
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}
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}
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];
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console.log('=== 方式1: users.filter(createFilter("...")) ===');
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console.log('\n=== premium 用户 ===');
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console.log(filter(users, "WHERE metadata.tags CONTAINS 'premium'"));
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console.log('\n=== 北京用户 ===');
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console.log(filter(users, "WHERE metadata.region = 'beijing'"));
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console.log('\n=== user 类型用户 ===');
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console.log(filter(users, "WHERE metadata.type = 'user'"));
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console.log('\n=== premium 且 user 类型 ===');
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console.log(filter(users, "WHERE metadata.tags CONTAINS 'premium' AND metadata.type = 'user'"));
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console.log('\n=== 北京或上海用户 ===');
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console.log(filter(users, "WHERE metadata.region IN ['beijing', 'shanghai']"));
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console.log('\n=== 方式2: filter(users, "...") (支持 ORDER BY 和 LIMIT) ===');
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console.log('\n=== 北京用户，按时间倒序 ===');
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console.log(filter(users, "WHERE metadata.region = 'beijing' ORDER BY metadata.created_at DESC"));
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console.log('\n=== 前2个用户，按时间倒序 ===');
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const limitResult = filter(users, "ORDER BY metadata.created_at DESC LIMIT 2");
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console.log('Limit result length:', limitResult.length);
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console.log(limitResult);
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const products = [
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{ name: 'Apple iPhone 15', category: 'Phone' },
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{ name: 'Samsung Galaxy S24', category: 'Phone' },
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{ name: 'Apple MacBook Pro', category: 'Laptop' },
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{ name: 'Apple Watch', category: 'Watch' }
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];
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console.log('\n=== LIKE 测试 ===');
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console.log('\n=== 包含 Apple 的产品 (%Apple%) ===');
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console.log(filter(products, "WHERE name LIKE '%Apple%'"));
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console.log('\n=== 以 Apple 开头的产品 (Apple%) ===');
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console.log(filter(products, "WHERE name LIKE 'Apple%'"));
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console.log('\n=== 以 Phone 结尾的产品 (%Phone) ===');
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console.log(filter(products, "WHERE name LIKE '%Phone%'"));
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console.log('\n=== 第二个字符任意的产品 (A_pple%) ===');
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console.log(filter(products, "WHERE name LIKE 'A_pple%'"));
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console.log('\n=== NOT LIKE 测试 ===');
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console.log('\n=== 不包含 Apple 的产品 (NOT LIKE %Apple%) ===');
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console.log(filter(products, "WHERE name NOT LIKE '%Apple%'"));
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console.log('\n=== IS NULL 和 IS NOT NULL 测试 ===');
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const usersWithNull = [
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{ name: 'Alice', email: 'alice@example.com', age: 25 },
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{ name: 'Bob', email: null, age: 30 },
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{ name: 'Charlie', email: undefined, age: 35 },
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{ name: 'Diana', email: 'diana@example.com', age: null }
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];
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console.log('\n=== Email 为 NULL 或 undefined 的用户 ===');
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console.log(filter(usersWithNull, "WHERE email IS NULL"));
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console.log('\n=== Email 不为 NULL 且不为 undefined 的用户 ===');
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console.log(filter(usersWithNull, "WHERE email IS NOT NULL"));
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console.log('\n=== Age 不为 NULL 且不为 undefined 的用户 ===');
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console.log(filter(usersWithNull, "WHERE age IS NOT NULL"));
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