如何在另一个查询循环中执行查询循环

Question

so my question is, how i can achieve this: I have an array of dates and an array of locations, i want to iterate the array of dates, and for each date, execute some query's, them iterate the whole array of locations doing an query for each item and them return an JSON response with the data.

PS I am using TypeOrm and i am also novice

Answer 1

If you've got two arrays, and you want to loop one inside of the other, then... just do that.

 var locations = ['Paris','St Louis','Moscow']; var dates = ['wednesday', 'thursday', 'friday']; async function run(locations, dates) { let results = []; for (let location of locations) { for (let date of dates) { console.log(`${location} - ${date}`); const newResults = await query(location, date); results = results.concat(newResults); } } return results; } run(locations, dates);

edited to include async query example