Locate every instance of items in an array within a string

Question

Locate every instance of items in an array within a string

My files have a structure similar to this:

https://i.stack.imgur.com/KyaVY.png

When a user conducts a search, they send an array to the backend. This array always includes at least one element.

For example, if they send ['javascript'] to the backend. Is there a method to query MongoDB to identify which documents contain the term javascript?

I attempted something like,

db.find({ body: { $all:['javascript'] } });

However, this only functions if body is also an array. Are there any other ways to achieve this?

javascript mongodb mongoose

Answer 1

Answer №1

One way to search for multiple keywords in a text is by creating a pipe-delimited regex pattern with the list of keywords like so:

const words = ["react", "node", "angular"];
const regexPattern = words.join("|");

db.find({
  body: { $regex: regexPattern, $options: 'i' }
});

Answer 2

One way to search for multiple keywords in a text is by creating a pipe-delimited regex pattern with the list of keywords like so:

const words = ["react", "node", "angular"];
const regexPattern = words.join("|");

db.find({
  body: { $regex: regexPattern, $options: 'i' }
});

Answer 3

Answer №2

To utilize the $regex operator, simply include a regex within a string:

db.find({ content: { $regex: ".*python.*" }});

Alternatively, you can use the following methods:

db.find({ content: /.*python.*/ });
db.find({ content: /python/ });

Answer 4

To utilize the $regex operator, simply include a regex within a string:

db.find({ content: { $regex: ".*python.*" }});

Alternatively, you can use the following methods:

db.find({ content: /.*python.*/ });
db.find({ content: /python/ });

Answer 5

Answer №3

To begin, the first step is to establish a text index on the specific fields you wish to search within. If your intention is to search across all fields in the collection, simply execute the following command:

db.collection.createIndex( { "$**": "text" } )

If you only want to search within certain designated fields, then utilize this format instead:

db.collection.createIndex( { title: "text", body: "text" } )

You also have the option to assign weightage to the fields, such as giving more importance to 'title' over 'description'.

Subsequently, conduct your searches using the syntax below:

db.collection.find( { $text: { $search: "java javascript python" } } )

This query will retrieve documents containing any or all of the specified words: java, javascript, or python.

Answer 6

To begin, the first step is to establish a text index on the specific fields you wish to search within. If your intention is to search across all fields in the collection, simply execute the following command:

db.collection.createIndex( { "$**": "text" } )

If you only want to search within certain designated fields, then utilize this format instead:

db.collection.createIndex( { title: "text", body: "text" } )

You also have the option to assign weightage to the fields, such as giving more importance to 'title' over 'description'.

Subsequently, conduct your searches using the syntax below:

db.collection.find( { $text: { $search: "java javascript python" } } )

This query will retrieve documents containing any or all of the specified words: java, javascript, or python.

Locate every instance of items in an array within a string

Answer №1

Answer №2

Answer №3

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