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// Test that the shardCollection command fails when a preexisting document lacks a shard key field.
// SERVER-8772
var st = new ShardingTest({shards: 1});
st.stopBalancer();
var db = st.s.getDB('testDb');
var coll = db.testColl;
coll.insert({x: 1, z: 1});
coll.insert({y: 1, z: 1});
db.adminCommand({enableSharding: 'testDb'});
/**
* Assert that the shardCollection command fails, with a preexisting index on the provided
* 'shardKey'.
*/
function assertInvalidShardKey(shardKey) {
// Manually create a shard key index.
coll.dropIndexes();
coll.ensureIndex(shardKey);
// Ensure that the shard key index identifies 'x' as present in one document and absent in the
// other.
assert.eq(1, coll.find({x: 1}).hint(shardKey).itcount());
assert.eq(1, coll.find({x: {$exists: false}}).hint(shardKey).itcount());
// Assert that the shardCollection command fails with the provided 'shardKey'.
assert.commandFailed(db.adminCommand({shardCollection: 'testDb.testColl', key: shardKey}),
'shardCollection should have failed on key ' + tojson(shardKey));
}
// Test single, compound, and hashed shard keys.
assertInvalidShardKey({x: 1});
assertInvalidShardKey({x: 1, y: 1});
assertInvalidShardKey({y: 1, x: 1});
assertInvalidShardKey({x: 'hashed'});
st.stop();
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