Conditional branching; rapid prototyping

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3 years 2 months ago #111838 by holch
holch replied the topic: Conditional branching; rapid prototyping
On the Expression Manager manual page there is an example of the SGQA code. It is quite simple.
S = Survey (Refers to the survey id)
G = Group (Refers to the group id)
Q = Question (refers to the question id)
A = Answer (refers to the answer id)

Here the manual page for the SGQA identifier: manual.limesurvey.org/SGQA_identifier

Often it helps to search with "limesurvey xxxxx" in Google, which seems to work better than the actual search in the manual.

I'm not a LimeSurvey GmbH member. I answer at the LimeSurvey forum in my spare time. No support via private message.
Some helpful links: Manual (EN) | Question Types | Workarounds
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3 years 2 months ago #111839 by holch
holch replied the topic: Conditional branching; rapid prototyping
Try also to understand the examples on the Expression Manager page. You can learn a lot from them and how Expression Manager works.

I'm not a LimeSurvey GmbH member. I answer at the LimeSurvey forum in my spare time. No support via private message.
Some helpful links: Manual (EN) | Question Types | Workarounds

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3 years 2 months ago - 3 years 2 months ago #111840 by dglp
dglp replied the topic: Conditional branching; rapid prototyping
I am finding the information on that page too complex (and in the manual generally). The examples on relevance relate more to inserting previous answers than to the mechanics of writing a simple instruction to branch.

I am unable to evaluate the correctness of an expression, and don't see all the rules about syntax. So I'm just guessing at it again and again until something changes.

Whilst it's clear there are many powerful tools to aid development, there is a steep learning curve/high bar to understanding their proper use. There are many ways to misunderstand the information!
Last Edit: 3 years 2 months ago by dglp.

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3 years 2 months ago #111841 by holch
holch replied the topic: Conditional branching; rapid prototyping
Definitely, Expression Manager is very complex and thus it is not learned in 5 minutes. This is advanced survey development, which will also require a little advanced learning and some time investment. There are also more pages.

However, it is impossible to explain the basics of EM in the forum. Here we can only help on specific problems and questions.

I'm not a LimeSurvey GmbH member. I answer at the LimeSurvey forum in my spare time. No support via private message.
Some helpful links: Manual (EN) | Question Types | Workarounds

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3 years 2 months ago - 3 years 2 months ago #111842 by dglp
dglp replied the topic: Conditional branching; rapid prototyping
Okay.
I appreciate the limitations of the forum.

So far I have put in about 120 hours over 6 weeks trying to figure out how Lime Survey works.
Some of that development has been straightforward to figure out. Other bits not so much. I am hoping another week will get me to a point where I can activate a 30-question survey.
Last Edit: 3 years 2 months ago by dglp.

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3 years 2 months ago #111844 by holch
holch replied the topic: Conditional branching; rapid prototyping
120h is quite a bit, you must have quite a complicated survey.

We always try to help, but it is always better to have a specific problem. I don't really understand your problem described above.

I'm not a LimeSurvey GmbH member. I answer at the LimeSurvey forum in my spare time. No support via private message.
Some helpful links: Manual (EN) | Question Types | Workarounds
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3 years 2 months ago #111851 by dglp
dglp replied the topic: Conditional branching; rapid prototyping
It's not a complicated survey - it's probably about as simple as they come. Probably too simple to have considered as an example in the manual. It's just a bunch of forward jumps. But it's laborious typing it out in order to test the expressions. So I've spent about 90 of those hours just monkeying with the coding.

The expression example I put up earlier was meant to describe a jump from either of two answers, in the form of ((Question1 AND Answer 1) OR (Question 3 AND Answer 1)). The survey looks like it will have 3 or 4 extraordinarily long expressions of this sort, where any of over 20 questions will jump to the same point later in the survey. I expect it to look like ((Question1 AND Answer 1) OR (Question 3 AND Answer 1) OR (Question 7 AND Answer 1) OR ... (Question 19 AND Answer 1) OR (Question 25 AND Answer 1)).

But I have given my questions the same variable names as the question groups they are in. This may be why some of the jumps fail. Group 1 is called Access, Question 1 is also called Access. When I named them I did not understand the limitation about naming variables for use by Expression Manager. I still don't know anything beyond that one fact.

So I need to go back and rename all of the questions. Or find some other way of specifying the target in EM.

So I asked if I could use another identifier like QID. That didn't work, so I will go back and rename the questions. THen see if there are other jump failures from as-yet-unknown reasons.

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3 years 2 months ago - 3 years 2 months ago #111905 by dglp
dglp replied the topic: Conditional branching; rapid prototyping
Here's a puzzler.

On a survey logic display, the order of group labels are displaced part way through the survey.

Initially, Group rows are Followed by Question rows and Answer rows.
At one point, the Group Name shifts, and shows up after the Answer rows.
The GID does not shift.

In short, only the label is displaced.

Here's a simplified diagram of the shift.




It looks as though the move of Question1 into Group 0 has caused the Group 1 label to displace onto the Group 2 row.

Is that right?
Attachments:
Last Edit: 3 years 2 months ago by dglp.

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3 years 2 months ago #111906 by dglp
dglp replied the topic: Conditional branching; rapid prototyping
I suppose the answer is that the Reordering Tool doesn't know that a Group requires a Question. It allows me to move any question from one group to another, including the last remaining question.

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3 years 2 months ago #111907 by holch
holch replied the topic: Conditional branching; rapid prototyping
You can't jump from one question to another in Limesurvey. You need to hide the questions that should not be shown.

I'm not a LimeSurvey GmbH member. I answer at the LimeSurvey forum in my spare time. No support via private message.
Some helpful links: Manual (EN) | Question Types | Workarounds
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