private IWhereFragment buildChildCollectionQuery(IQueryableDocument mapping, QueryModel query, Expression valueExpression, string op)
{
var members = FindMembers.Determine(query.MainFromClause.FromExpression);
var field = mapping.FieldFor(members);
if (query.HasOperator<CountResultOperator>())
{
var value = field.GetValue(valueExpression);
return new WhereFragment($"jsonb_array_length({field.SqlLocator}) {op} ?", value);
}
throw new NotSupportedException("Marten does not yet support this type of Linq query against child collections");
}