Use Sequelize on for loop findAll query and merge result - mysql

Question

I'm coding opensource project in the university course
It is a function to search the value of another table by dividing input keyword by comma.
under this example data
Python,CPP,Csharp
var keyword = result[0].keyword;
var keyword_arr = [];
var keyword_split = keyword.split(',');
for (var i in keyword_split)
{
keyword_arr.push(keyword_split[i]);
}
I have succeeded in separating them with commas like above, but I'm looking for a loop in sequelize.
"Error: Can not set headers after they are sent."
An error is returned and is not executed.
I want to output the results merged. What should I do?
my code is
for (i = 0; i < keyword_arr.length; i++) {
query += models.contents.findAll({
where: {keyword: {like: '%' + keyword_arr[i] + '%'}},
raw: true
});
}
Regards.

Answer 1

You were in the right direction , but here it his how you can do :
queries = [];
for (i = 0; i < keyword_arr.length; i++) {
queries.push({keyword: {like: '%' + keyword_arr[i] + '%'}});
}
models.contents.findAll({
where: {
$or : queries
}
raw: true
}).then(results => {
console.log(results); // <---- Check this
})
NOTES :
models.contents.findAll() //<---- Returns promises
You can't just combine the promises by += as its not string or number
like that
In your case , it will create and run the query for each tag , so
that's not proper way of doing , you should combine the tags and create a single query as I did