Couchdb views

gistfile1.txt

DB have one document kind - a transaction.

{
  "_id": "0x0000000c72452d9599cf6c51bfbe009acdda360a5aec907a1a9dc62cf5abaa99",
  "_rev": "1-86090328861b5ef615e4795d1284a5d5",
  "blockNumber": 3892484,
  ..
  ..
  "from": "0x003b177cB2365bA31434BE52f308FF3eA5b999eE",
  "to": "0x7eD1E469fCb3EE19C0366D829e291451bE638E59",
  "value": "201990651324420384",
  "contractAddress": null
}

Queries needed:

1. all docs that "from" or "to" fields are equal to x.
2. all docs that "from" == x and "contractAddress" == y.
 
 DB have 3 views, design doc for each view
  
 to view:
 
 map: function(doc) {
      if (doc.to) {
        emit(doc.to, {_id: doc._id});
      }
    }
 
from view:

    map: function(doc) {
      if (doc.from) {
        emit(doc.from, {_id: doc._id});
      }
    }
  
contract view: ( 

    map: function(doc) {
      if (doc.contractAddress) {
        emit([doc.from, doc.to, doc.contractAddress], {_id: doc._id});   // doc.to is always null.
      }
    }
  
  
  
  

It is possible to combine all views into a single one:

function (doc) {
  if (doc.from) {
   emit([doc.from, null], null)
  }
  if (doc.to) {
   emit([doc.to, doc.contractAddress], null)
 }
}

Query with startkey=[x] and endkey=[x, {}] to get all rows with either to or from matching x (query 1).
Query with key=[x, y] to get contracts (query 2).

Thanks. I will check it.
I can do the queries with this one view:

emit([doc.from, doc.to, doc.contractAddress])
But I thought 3 simple views are better than one heavy view?