Inserting json file into Cassandra table - json

Question

I am currently using the Cassandra-Ruby driver to insert data from a JSON file into an existing table in my database.
the JSON file looks like this:
[
{
"id": "123",
"destination": "234",
"type": "equipment",
"support": "type 1",
"test": "test1"
},
{
"id": "234",
"destination": "123",
"type": "equipment",
"support": "type 1",
"test": "test1"
}
]
I am reading in the file like this:
file = File.read('itemType.json')
data_hash = JSON.parse(file) #return an array of hashes
Iterate through the array and get each hash
and insert each hash onto the table
data_hash.each do |has|
#check the type of each object
#puts has.class #return hash
insert_statement = session.prepare('INSERT INTO keyspace.table JSON ?')
session.execute(insert_statement, [has]) #error occurs here
end
After running this code, I get this error message
in `assert_instance_of': options must be a Hash
I checked that each object being inserted in the table is a hash, so I'm not sure why I'm getting this issue.

Answer 1

You are saying that you are inserting a JSON but you are not, you are trying to insert an object. See this example from the documentation:
INSERT INTO cycling.cyclist_category JSON '{
"category" : "Sprint",
"points" : 700,
"id" : "829aa84a-4bba-411f-a4fb-38167a987cda"
}';
You have to give it a json format if you do it like that.

Answer 2

using .to_json add \ escape character. This gave me error
INSERT INTO organization_metadata JSON '{\"id\":9150,\"destroyed\":false,\"name\":\"ABC\",\"timestamp\":1510541801000000000}';
and the following worked.
INSERT INTO organization_metadata JSON '{"id":9150,"destroyed":false,"name":"ABC","timestamp":1510541801000000000}';