Mongo query to create a subform from json entry - json

Question

I want to only access a part of the document. Only Variables in the entry given below in the following format.
Document1:{
"META" : {
"CATEGORY" : "Boxes",
"CREATEDBY" : "Garima",
"PRIVACY" : "PUBLIC",
"KEYWORDS" : [
"day","night"
],
"TEMPLATE_NAME" : "Name",
"IS_ACTIVE" : true
},
"**Variables**" : **[
{
"INDEX" : 0,
"DATATYPE" : "string",
"NAME" : "varient text type",
},
{
"INDEX" : 1,
"DATATYPE" : "number",
"NAME" : "varient number type",
},
{
"INDEX" : 2,
"DATATYPE" : "price",
"NAME" : "varient price type",
},
{
"INDEX" : 3,
"DATATYPE" : "date",
"NAME" : "varient date type",
},
{
"INDEX" : 4,
"DATATYPE" : "text",
"NAME" : "varient textarea type",
},
{
"INDEX" : 5,
"DATATYPE" : "string",
"NAME" : "varient blank radio type",
},
{
"INDEX" : 6,
"DATATYPE" : "string",
"NAME" : "varient single radio type",
},**
Output Required
**Variable Names [varient text type,varient number type,varient price type,varient date type,varient textarea type,varient blank radio type,varient single radio type]**
I have used db.collection.find({Variables}) but doesn't show as it is an array.
Later I want these names to create a form in meteor using autoform

Answer 1

JS File:
var variant=CollectionName.find( { "VARIENTS.NAME": 1, _id : 0 } );
HTML File:
{{#each variant}}
<li>
{{#each VARIENTS}}
{{this.NAME}}
{{/each}}
</li>
{{/each}}
This will display the variant names only.

Answer 2

Your desired output and sample data are not matching.
Is it what you are looking for-
db.collectionName.find({},{"Variables.INDEX":1,"Variables.DATATYPE":1,"Variables.NAME":1, "_id":0})
Above query will gives following output with sample data provided in question.
{
"Variables" : [
{
"INDEX" : 0,
"DATATYPE" : "string",
"NAME" : "varient text type"
},
{
"INDEX" : 1,
"DATATYPE" : "number",
"NAME" : "varient number type"
},
{
"INDEX" : 2,
"DATATYPE" : "price",
"NAME" : "varient price type"
},
{
"INDEX" : 3,
"DATATYPE" : "date",
"NAME" : "varient date type"
},
{
"INDEX" : 4,
"DATATYPE" : "text",
"NAME" : "varient textarea type"
},
{
"INDEX" : 5,
"DATATYPE" : "string",
"NAME" : "varient blank radio type"
},
{
"INDEX" : 6,
"DATATYPE" : "string",
"NAME" : "varient single radio type"
}
]
}