Display the documents with partial matching of field value in mongodb - node.js

Question

The below is my movie schema:
"_id" : ObjectId("59b9501600fcb397d6acd5bb"),
"theatreid" : 2,
"name" : "carnival cinemas",
"location" : "kanjulmarg",
"address" : "sec 2,kanjul, Mumbai, Maharashtra 400703",
"shows" : [
{
"mname" : "bareily ki barfi",
"timings" : [
10,
13,
14,
16,
22
]
},
{
"mname" : "Toilet:ek prem katha",
"timings" : [
8,
9,
14,
16,
20,
23
]
}
]
"_id" : ObjectId("59b9506500fcb397d6acd5bc"),
"theatreid" : 3,
"name" : "pheonix pvr",
"location" : "kurla",
"address" : "sec 26,kurla, Mumbai, Maharashtra 400701",
"shows" : [
{
"mname" : "shubh mangal savdhan",
"timings" : [
9,
11,
15,
18,
20
]
},
{
"mname" : "Toilet:ek prem katha",
"timings" : [
8,
9,
14,
16,
20,
23
]
}
]
My query is to display all the theaters having show timing (shows.timings) greater than 20 and the location is kurla.I am using nodeJS.
The query is as follows:
user.aggregate([{$match:{"location":"kurla"}},{"$addFields": {"shows": {"$map": {"input": "$shows","as": "resultm","in": {"name": "$$resultm.name","mname": "$$resultm.mname","timings": {"$filter": {"input": "$$resultm.timings","as": "resultf","cond": {"$gte": ["$$resultf",10]}}}}}}}}])
This works fine when it gets the exact match where location="kurla",but i want that it should also work and display the same records even if location=kurla east,maharashthra,mumbai.That is even if a partial match is found in the location attribute of my collection.How can this be done!Please help. Thanks:)

Answer 1

Use the $regex operator to apply a partial text match on the location attribute.
Replace this ...
{$match:{"location":"kurla"}}
... with this:
{ $match: {location: { $regex: /^kurla/ } } }
In the above example the condition is location like 'kurla%'.
More details in the docs.
This presumes that the values you wish to filter on are all in the location field, this is consistent with the following statement from your question:
location=kurla east,maharashthra,mumbai
There are no examples of "maharashthra" or "mumbai" in the location field in the example documents you showed however "maharashthra" does appear in the address attribute so if your filter is actually to be applied to location and/or address then the solution will be different to what I have posted above. If this is the case, perhaps you could update your question to clarify.