In a boolean query can I specify multiple must clauses or a single must clause with multiple terms?

Here's my full query. I'm using the Ruby gem for ElasticSearch. I have it currently working with just one must clause and single term in that.

query: { bool: { must: [{ term: { successful: true }}, { term: { account_id:}}]},
filter: { range: { record_completed_at: { gte: begin_date, lte: end_date }}}},
aggregations: {
deliveries: { date_histogram: {
field: "record_completed_at", interval: "day", format: "yyyy-MM-dd", min_doc_count: 0,
time_zone: timezone.identifier,
extended_bounds: { min: begin_date, max: end_date}}}})

With this modified query I'm getting the following error:
[400] {"error":{"root_cause":[{"type":"parse_exception","reason":"failed to parse search source. expected field name but got [START_OBJECT]"}],"type":"search_phase_execution_exception","reason":"all shards failed","phase":"query_fetch","grouped":true,"failed_shards":[{"shard":0,"index":"roots","node":"613MZvDtSx2fK6jutlo4yg","reason":{"type":"parse_exception","reason":"failed to parse search source. expected field name but got [START_OBJECT]"}}]},"status":400}

Ugh I see my error now. Nevermind.

Hi Steve,
it might be interesting for others what was wrong with your initial approach. So it would be great if you can share your findings.

I had an extra curly after the ].