51 lines
1.7 KiB
JavaScript
51 lines
1.7 KiB
JavaScript
/**
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* Demonstrate that mapReduce can accept functions represented by strings.
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* Some drivers do not have a type which represents a Javascript function. These languages represent
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* the arguments to mapReduce as strings.
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* @tags: [
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* # The test runs commands that are not allowed with security token: mapReduce.
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* not_allowed_with_signed_security_token,
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* does_not_support_stepdowns,
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* uses_map_reduce_with_temp_collections,
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* # Uses $where operator
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* requires_scripting,
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* ]
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*/
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const col = db.function_string_representations;
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const out = db.map_reduce_example;
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col.drop();
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assert.commandWorked(
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col.insert({
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_id: "abc123",
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ord_date: new Date("Oct 04, 2012"),
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status: "A",
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price: 25,
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items: [
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{sku: "mmm", qty: 5, price: 2.5},
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{sku: "nnn", qty: 5, price: 2.5},
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],
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}),
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);
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let mapFunction = "function() {emit(this._id, this.price);}";
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let reduceFunction = "function(keyCustId, valuesPrices) {return Array.sum(valuesPrices);}";
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out.drop();
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assert.commandWorked(col.mapReduce(mapFunction, reduceFunction, {out: {merge: "map_reduce_example"}}));
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// Provided strings may end with semicolons and/or whitespace
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mapFunction += " ; ";
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reduceFunction += " ; ";
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out.drop();
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assert.commandWorked(col.mapReduce(mapFunction, reduceFunction, {out: {merge: "map_reduce_example"}}));
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// $where exhibits the same behavior
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let whereFunction = "function() {return this.price === 25;}";
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assert.eq(1, col.find({$where: whereFunction}).itcount());
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whereFunction += ";";
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assert.eq(1, col.find({$where: whereFunction}).itcount());
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// system.js does not need to be tested, as its contents types' are preserved, and
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// strings are not promoted into functions.
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