String matching using regex for array of items in a document in mongodb collection

Question

I want to make a universal search where I search the db with a given text for a particular company. I have a products collection with each document having following fields

{
  _id: '',
  company: 'Amazon'
  category: 'Apparels',
  category1: 'Boys',
  tags: ['cotton', 'linen', 'handwash'], // random length array
  attribute: 'Style'
}.... many more such documents 

input fields:

text = 'cotton'
name ='Amazon'

I have tried the following query to search any match for the given text in category, category1, tags, attribute

Query

db.products.aggregate([
   {
         $match: { 
            "company": 'Amazon',
            $or: [
              {"attribute": { $regex: text, $options: "i"}},
              {"category": { $regex: text, $options: "i" }},
              {"category1": { $regex: text, $options: "i" }},
              {"tags": { $regex: text, $options: "i" }}
            ]
          } 
       }
]);

I am not sure if this works for array tags , is this the correct way to compare regex against all array items?

Note : I do not want to use find queries, pure aggregation is needed

Answer 1

You can use the same However, the following may give you better solution.

 let text = 'Style'
let name = 'Amazon'
let regexString = "^" + text + "$";
db1.products.aggregate([
    {
        $match: {
            "company": name,
            $or: [
                { "attribute": { $regex: regexString } },
                { "category": { $regex: regexString } },
                { "category1": { $regex: regexString } },
                { "tags": { $regex: regexString } },
            ]
        }
    }
]).toArray()
    .then(re => res.json({ result: re }))
    .catch(err => res.json(err));

This will match exactly the same text. if you use ^ it will search for strings starting with the particular text and $ will search for strings ending with text value.