support all mongo find options, instead of just projection

Author: rouanw

README.md

@@ -40,7 +40,7 @@ Option|Description|Default value
 `collection`|Name of the collection with your data|**required**
 `url`|URL of the Mongo server to which you're connecting|`mongodb://localhost:27017`
 `query`|The query you'd like to run to filter the data returned|`{}` (all records)
-`projection`|Lets you specify the fields you'd like to return|`{}` (all fields)
+`options`|Lets you specify any of the Mongo driver's [find options](http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#find). This is especially useful for specifying a `projection` to limit the number of columns returned, or a `limit`, to limit the number of rows.|`{}`
 `outputFilePath`|Path to the file to which you want the results written|`./query_results.csv`
 `authDb`|Specify the database against which to authenticate|Defaults to the value supplied for `databaseName`
 

mongo-csv.js

@@ -12,7 +12,7 @@ const collection = config.collection;
 const outputFilePath = config.outputFilePath || './query_results.csv';
 
 const query = config.query || {};
-const projection = config.projection || {};
+const options = config.options || {};
 
 const mongoQuery = (query) => {
   const dateRegex = /\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+([+-][0-2]\d:[0-5]\d|Z)/;
@@ -43,7 +43,7 @@ const mongoQuery = (query) => {
   try {
     await client.connect();
     const db = client.db(databaseName);
-    const cursor = db.collection(collection).find(mongoQuery(query), { projection });
+    const cursor = db.collection(collection).find(mongoQuery(query), options);
     const documents = [];
     while (await cursor.hasNext()) {
       const document = await cursor.next();