A way to conditionally chain functions?-CodePudding

What im trying to do is to write a universal function for retrieving items from database using redis-om-node. It uses this chain of methods to specify what items we want to retrieve

const items = await repositoryObject
.search()
.where("property1")
.match(query)
.or("property2")
.match(query)
.or("property3")
.match(query)
.return.all();

Is there a way I could loop through array of properties to make this chain write itself like:

const items = await repositoryObject
.search()[loop outputed chain].return.all();

Im aware that I can just run raw search but I want to know am I missing something about javascript objects

CodePudding user response：

Sure, you could create an array of objects which contain the properties and corresponding queries that you want to use, and then loop through it like this:

const queries = [{ property: "property1", query: query1 }, { property: "property2", query: query2 }, { property: "property3", query: query3 }]; // etc

let result = repositoryObject.search();

for (const { property, query } of queries) {
  result = result.where(property).match(query);
}

return result.return.all();

You could get more fancy and use reduce if you wanted to:

// queries is as above

return queries.reduce((object, { property, query }) => object.property(property).match(query), repositoryObject.search()).return.all();

or use the forEach method on the array to loop. Basically you can loop all the ways you have in normal Javascript - you just have to use it to construct a property chain of the form you showed us.