Allow multiple experiments

Author: runestonetest

runestone/selectquestion/js/selectone.js

@@ -37,7 +37,7 @@ export default class SelectOne extends RunestoneBase {
         this.not_seen_ever = $(opts.orig).data("not_seen_ever");
         this.selector_id = $(opts.orig).first().attr("id");
         this.primaryOnly = $(opts.orig).data("primary");
-        this.isAB = $(opts.orig).data("ab");
+        this.ABExperiment = $(opts.orig).data("ab");
         opts.orig.id = this.selector_id;
     }
     /**
@@ -73,8 +73,8 @@ export default class SelectOne extends RunestoneBase {
         if (this.primaryOnly) {
             data.primary = this.primaryOnly;
         }
-        if (this.isAB) {
-            data.AB = this.isAB;
+        if (this.ABExperiment) {
+            data.AB = this.ABExperiment;
         }
         let opts = this.origOpts;
         let selectorId = this.selector_id;

runestone/selectquestion/selectone.py

@@ -70,6 +70,7 @@ class SelectQuestion(RunestoneIdDirective):
        :points: number of points for this question
        :min_difficulty: minimum difficulty level
        :max_difficulty: maximum difficulty level
+       :ab: experiment_name
 
        Difficulty is measured in one of two ways. For things like multiple choice and
        fill in the blank, we can use the % of students that get the answer correct on
@@ -91,7 +92,7 @@ class SelectQuestion(RunestoneIdDirective):
             "autogradable": directives.flag,
             "not_seen_ever": directives.flag,
             "primary": directives.flag,
-            "ab": directives.flag,
+            "ab": directives.unchanged,
         }
     )
 
@@ -167,7 +168,7 @@ def run(self):
             self.options["primary"] = ""
 
         if "ab" in self.options:
-            self.options["AB"] = "data-ab=true"
+            self.options["AB"] = f"data-ab={self.options['ab']}"
         else:
             self.options["AB"] = ""