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// Test sorting with text score metadata.
(function() {
"use strict";
var t = db.getSiblingDB("test").getCollection("fts_score_sort");
t.drop();
assert.writeOK(t.insert({_id: 0, a: "textual content"}));
assert.writeOK(t.insert({_id: 1, a: "additional content"}));
assert.writeOK(t.insert({_id: 2, a: "irrelevant content"}));
assert.commandWorked(t.ensureIndex({a: "text"}));
// $meta sort specification should be rejected if it has additional keys.
assert.throws(function() {
t.find({$text: {$search: "textual content"}}, {score: {$meta: "textScore"}})
.sort({score: {$meta: "textScore", extra: 1}})
.itcount();
});
// $meta sort specification should be rejected if the type of meta sort is not known.
assert.throws(function() {
t.find({$text: {$search: "textual content"}}, {score: {$meta: "textScore"}})
.sort({score: {$meta: "unknown"}})
.itcount();
});
// Sort spefication should be rejected if a $-keyword other than $meta is used.
assert.throws(function() {
t.find({$text: {$search: "textual content"}}, {score: {$meta: "textScore"}})
.sort({score: {$notMeta: "textScore"}})
.itcount();
});
// Sort spefication should be rejected if it is a string, not an object with $meta.
assert.throws(function() {
t.find({$text: {$search: "textual content"}}, {score: {$meta: "textScore"}})
.sort({score: "textScore"})
.itcount();
});
// Sort by the text score.
var results =
t.find({$text: {$search: "textual content -irrelevant"}}, {score: {$meta: "textScore"}})
.sort({score: {$meta: "textScore"}})
.toArray();
assert.eq(results.length, 2);
assert.eq(results[0]._id, 0);
assert.eq(results[1]._id, 1);
assert.gt(results[0].score, results[1].score);
// Sort by {_id descending, score} and verify the order is right.
var results =
t.find({$text: {$search: "textual content -irrelevant"}}, {score: {$meta: "textScore"}})
.sort({_id: -1, score: {$meta: "textScore"}})
.toArray();
assert.eq(results.length, 2);
assert.eq(results[0]._id, 1);
assert.eq(results[1]._id, 0);
// Note the reversal from above.
assert.lt(results[0].score, results[1].score);
}());
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