84 lines
2.8 KiB
JavaScript
84 lines
2.8 KiB
JavaScript
// SERVER-17943: Add $filter aggregation expression.
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// For assertErrorCode.
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load('jstests/aggregation/extras/utils.js');
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(function() {
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'use strict';
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var coll = db.agg_filter_expr;
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coll.drop();
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assert.writeOK(coll.insert({_id: 0, a: [1, 2, 3, 4, 5]}));
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assert.writeOK(coll.insert({_id: 1, a: [2, 4]}));
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assert.writeOK(coll.insert({_id: 2, a: []}));
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assert.writeOK(coll.insert({_id: 3, a: [1]}));
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assert.writeOK(coll.insert({_id: 4, a: null}));
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assert.writeOK(coll.insert({_id: 5, a: undefined}));
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assert.writeOK(coll.insert({_id: 6}));
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// Create filter to only accept odd numbers.
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filterDoc = {input: '$a', as: 'x', cond: {$eq: [1, {$mod: ['$$x', 2]}]}};
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var expectedResults = [
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{_id: 0, b: [1, 3, 5]},
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{_id: 1, b: []},
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{_id: 2, b: []},
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{_id: 3, b: [1]},
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{_id: 4, b: null},
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{_id: 5, b: null},
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{_id: 6, b: null},
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];
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var results =
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coll.aggregate([{$project: {b: {$filter: filterDoc}}}, {$sort: {_id: 1}}]).toArray();
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assert.eq(results, expectedResults);
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// create filter that uses the default variable name in 'cond'
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filterDoc = {input: '$a', cond: {$eq: [2, '$$this']}};
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expectedResults = [
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{_id: 0, b: [2]},
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{_id: 1, b: [2]},
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{_id: 2, b: []},
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{_id: 3, b: []},
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{_id: 4, b: null},
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{_id: 5, b: null},
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{_id: 6, b: null},
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];
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results = coll.aggregate([{$project: {b: {$filter: filterDoc}}}, {$sort: {_id: 1}}]).toArray();
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assert.eq(results, expectedResults);
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// Invalid filter expressions.
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// '$filter' is not a document.
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var filterDoc = 'string';
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assertErrorCode(coll, [{$project: {b: {$filter: filterDoc}}}], 28646);
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// Extra field(s).
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filterDoc = {input: '$a', as: 'x', cond: true, extra: 1};
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assertErrorCode(coll, [{$project: {b: {$filter: filterDoc}}}], 28647);
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// Missing 'input'.
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filterDoc = {as: 'x', cond: true};
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assertErrorCode(coll, [{$project: {b: {$filter: filterDoc}}}], 28648);
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// Missing 'cond'.
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filterDoc = {input: '$a', as: 'x'};
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assertErrorCode(coll, [{$project: {b: {$filter: filterDoc}}}], 28650);
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// 'as' is not a valid variable name.
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filterDoc = {input: '$a', as: '$x', cond: true};
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assertErrorCode(coll, [{$project: {b: {$filter: filterDoc}}}], 16867);
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// 'input' is not an array.
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filterDoc = {input: 'string', as: 'x', cond: true};
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assertErrorCode(coll, [{$project: {b: {$filter: filterDoc}}}], 28651);
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// 'cond' uses undefined variable name.
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filterDoc = {input: '$a', cond: {$eq: [1, '$$var']}};
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assertErrorCode(coll, [{$project: {b: {$filter: filterDoc}}}], 17276);
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assert(coll.drop());
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assert.writeOK(coll.insert({a: 'string'}));
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filterDoc = {input: '$a', as: 'x', cond: true};
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assertErrorCode(coll, [{$project: {b: {$filter: filterDoc}}}], 28651);
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}());
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