Building queries in ruflin Elastic search Symfony3 - elasticsearch

Question

I am having hard times with Elastica and ruflin library for PHP to build the queries. There are no many examples I could follow.
I have User entity in Symfony project which consists of the following fields:
firstName, lastName, emailAddress, studio and member or client (depended on what user it is)
So now I would like to filter out some results.
I want to display users only matching the certain studio:
$finder = $this->get('fos_elastica.finder.app.user');
$boolQuery = new BoolQuery();
$fieldQuery = new Match();
$fieldQuery->setFieldQuery('studio', 'StackOverflow studio');
$boolQuery->addMust($fieldQuery);
I want to display all users with name John:
$fieldQuery = new MoreLikeThis();
$fieldQuery->setFields(['firstName', 'lastName', 'emailAddress']);
$fieldQuery->setLikeText('John');
$boolQuery->addMust($fieldQuery);
I want to get members of that studio (not clients)
Note: User has relation to Client and Member entity. Depending on that, it will show either Member:Object or Client:Object. In this case I want to be sure that Member exists.
$fieldQuery = new Filtered();
$fieldQuery->setFilter(new Exists('member'));
$boolQuery->addMust($fieldQuery);
$users = $finder->find($boolQuery);
The problem is that... it does not work. It shows me 0 results. No matter how I play with that it shows me 0 results or wrong results.
Can someone help me out how to build proper query using ruflin library for Elastica to get results based in the conditions I have mentioned above?
RAW QUERY:
{
"query":{
"bool":{
"must":[
{
"match":{
"studio":{
"query":"StackOverflow studio"
}
}
},
{
"filtered":{
"filter":{
"exists":{
"field":"member"
}
}
}
},
{
"more_like_this":{
"fields":[
"firstName",
"lastName",
"emailAddress"
],
"like_text":"John"
}
}
]
}
}
}
UPDATE 1:
I have manged to fix 3rd query (Exists('member')). It turned out that I have forgot to put client and member under mappings in config.yml. Still 2nd query fails.

Answer 1

Since there's no answer, I will answer myself.
Instead of using MoreLikeThis query to find a piece of text, I have used QueryString and thing started to work
Here's how whole thing looks like now:
config.yml:
fos_elastica:
...
indexes:
app:
types:
user:
mappings:
emailAddress: ~
firstName: ~
lastName: ~
studio: ~
member: ~
client: ~
persistence:
driver: orm
model: AppBundle\Entity\User
provider: ~
listener:
finder: ~
Controller:
$finder = $this->get('fos_elastica.finder.app.user');
$boolQuery = new BoolQuery();
$fieldQuery = new Match();
$fieldQuery->setFieldQuery('studio', 'StackOverflow studio');
$boolQuery->addMust($fieldQuery);
$fieldQuery = new Filtered();
$fieldQuery->setFilter(new Exists('member'));
$boolQuery->addMust($fieldQuery);
$fieldQuery = new QueryString();
$fieldQuery->setFields(['firstName', 'lastName', 'emailAddress']);
$fieldQuery->setQuery('John*'); // * wildcard will filter look a like results for you.
$boolQuery->addMust($fieldQuery);
$query = new Query();
$query->setQuery($boolQuery);
$query->addSort(['firstName' => 'asc']);
$users = $finder->find($query);