mgo $ all使用数组查询数组并且不区分大小写？

Question

I have an array of ingredient names that is dynamic and provided per user. I'd like to match it to mongo documents where there is an array of objects called ingredients which has a property name. I've written a query (see below) which will take query parameters from the URL and will return all the documents that have all matching ingredient names, however this search is case sensitive and I'd like it not to be.

I've considered using bson.RegEx with Option: "i", however I'm not sure how to form this query or apply it to an array of strings.

Here is the case sensitive query:

// Check for ingredients, return all recipes that can be made using supplied ingredients
if qryPrms["ingredients"] != nil {
    mongodQ["ingredients.name"] = bson.M{"$all": qryPrms["ingredients"]}
}

mongodQ is the bson.M I use to query the collection later in the code. Ideally I could apply RegEx to each element in qryPrms["ingredients"] so it would return closely matching ingredients like cheese would return swiss cheese as well. This is also a more general mongodb question I suppose when it comes to querying with a dynamic array.

Answer 1

I was able to accomplish this using a for loop to build a slice of type bson.RegEx.

if qryPrms["ingredients"] != nil {
        var ingRegEx []bson.RegEx
        for i := range qryPrms["ingredients"] {
            ingRegEx = append(ingRegEx, bson.RegEx{Pattern: qryPrms["ingredients"][i], Options: "i"})
        }
        mongodQ["ingredients.name"] = bson.M{"$all": ingRegEx}
    }