70 lines
2.3 KiB
Ruby
70 lines
2.3 KiB
Ruby
# --
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# Copyright (C) 2008-2009 10gen Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ++
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require 'mongo/message/message'
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require 'mongo/message/opcodes'
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require 'mongo/util/conversions'
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require 'mongo/util/ordered_hash'
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module Mongo
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class QueryMessage < Message
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include Mongo::Conversions
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attr_reader :query
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def initialize(db_name, collection_name, query)
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super(OP_QUERY)
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@query = query
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@collection_name = collection_name
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write_int(0)
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write_string("#{db_name}.#{collection_name}")
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write_int(query.number_to_skip)
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write_int(query.number_to_return)
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sel = query.selector
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if query.contains_special_fields
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sel = OrderedHash.new
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sel['query'] = query.selector
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if query.order_by
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order_by = query.order_by
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sel['orderby'] = case order_by
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when String then string_as_sort_parameters(order_by)
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when Symbol then symbol_as_sort_parameters(order_by)
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when Array then array_as_sort_parameters(order_by)
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when Hash # Should be an ordered hash, but this message doesn't care
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warn_if_deprecated(order_by)
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order_by
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else
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raise InvalidSortValueError.new("illegal order_by: is a #{query.order_by.class.name}, must be String, Array, Hash, or OrderedHash")
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end
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end
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sel['$hint'] = query.hint if query.hint && query.hint.length > 0
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sel['$explain'] = true if query.explain
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sel['$snapshot'] = true if query.snapshot
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end
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write_doc(sel)
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write_doc(query.fields) if query.fields
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end
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def first_key(key)
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@first_key = key
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end
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def to_s
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"db.#{@collection_name}.#{@query}"
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end
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end
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end
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