74 lines
1.9 KiB
JavaScript
74 lines
1.9 KiB
JavaScript
// @tags: [
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// # mapReduce does not support afterClusterTime.
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// does_not_support_causal_consistency,
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// does_not_support_stepdowns,
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// ]
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// See SERVER-9448
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// Test argument and receiver (aka 'this') objects and their children can be mutated
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// in Map, Reduce and Finalize functions
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var collection = db.mrMutableReceiver;
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collection.drop();
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collection.insert({a: 1});
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var map = function() {
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// set property on receiver
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this.feed = {beef: 1};
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// modify property on receiever
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this.a = {cake: 1};
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emit(this._id, this.feed);
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emit(this._id, this.a);
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};
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var reduce = function(key, values) {
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// set property on receiver
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this.feed = {beat: 1};
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// set property on key arg
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key.fed = {mochi: 1};
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// push properties onto values array arg
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values.push(this.feed);
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values.push(key.fed);
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// modify each value in the (modified) array arg
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values.forEach(function(val) {
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val.mod = 1;
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});
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return {food: values};
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};
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var finalize = function(key, values) {
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// set property on receiver
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this.feed = {ice: 1};
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// set property on key arg
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key.fed = {cream: 1};
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// push properties onto values array arg
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printjson(values);
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values.food.push(this.feed);
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values.food.push(key.fed);
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// modify each value in the (modified) array arg
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values.food.forEach(function(val) {
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val.mod = 1;
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});
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return values;
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};
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var mr = collection.mapReduce(map, reduce, {finalize: finalize, out: {inline: 1}});
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printjson(mr);
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// verify mutated properties exist (order dictated by emit sequence and properties added)
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assert.eq(mr.results[0].value.food[0].beef, 1);
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assert.eq(mr.results[0].value.food[1].cake, 1);
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assert.eq(mr.results[0].value.food[2].beat, 1);
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assert.eq(mr.results[0].value.food[3].mochi, 1);
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assert.eq(mr.results[0].value.food[4].ice, 1);
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assert.eq(mr.results[0].value.food[5].cream, 1);
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mr.results[0].value.food.forEach(function(val) {
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assert.eq(val.mod, 1);
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});
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