mirror of https://github.com/mongodb/mongo
21 lines
753 B
JavaScript
21 lines
753 B
JavaScript
const collName = jsTestName();
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const coll = db[collName];
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coll.drop();
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assert.commandWorked(coll.insertOne({string: "foo"}));
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// check that without $literal we end up comparing a field with itself and the result is true
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let result = db.runCommand({
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aggregate: collName,
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pipeline: [{$project: {stringis$string: {$eq: ["$string", "$string"]}}}],
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cursor: {},
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});
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assert.eq(result.cursor.firstBatch[0].stringis$string, true);
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// check that with $literal we end up comparing a field with '$string' and the result is true
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result = db.runCommand({
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aggregate: collName,
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pipeline: [{$project: {stringis$string: {$eq: ["$string", {$literal: "$string"}]}}}],
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cursor: {},
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});
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assert.eq(result.cursor.firstBatch[0].stringis$string, false);
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