fetch pictures with mongoose with a certain parameter - express

Question

Hi and thanks for all the people willing and ready to help me out !
I have a mongoose Model like so :
const pictureSchema = mongoose.Schema ({
pictureName : String,
creator : String,
description : String,
img : String,
createdAt : {
type : Date,
default : new Date(),
},
themeLinked : String
})
Now what i am trying to do, is to fetch all the documents that have a certain specific value for "themeLinked". it's like sorting all the entries in my documents that have the same "themeLinked".
so what i did, from my front-end react App, i sent the value of theme linked as a req.param. so it is sent to my back end with the GET request.
and in my back end, in the controller i wrote this code :
const fetchPictures = async (req,res) => {
const {themeId} = req.params;
try {
const pictures = await pictureModel.findOne({themeLinked : themeId});
res.status(200).json(pictures)
} catch (err) {
res.status(404).json({ message : err})
}
}
and in the network Tab in my chrome browser, i get 'null' as a value for Response.
so beeing a begginer i am struggling to find the right way to fetch all the pictures that have the same 'themeLinked' value....this must be pretty simple but i'm struggling
thanks !!

Answer 1

ok i got, it, all i needed to do was :
const fetchPictures = async (req,res) => {
const {themeId} = req.params;
try {
const pictures = await pictureModel.find({themeLinked : themeId});
res.status(200).json(pictures)
} catch (err) {
res.status(404).json({ message : err})
}
}
for Obvious lexical reasons, findOne only returns one entry, as find returns all entries that have the same matching 'themeLinked' value....:)