Analyses fail when more than one input or pair of inputs is used

[hackdna]

Commit 9ffd03e. Galaxy is at revision: da2cc588e5 (release_15.10 branch) from 30 Nov 2015 (CloudMan).

Steps to reproduce

1. Open a data set and click on the Analyze tab
2. Select a workflow
3. Select a file set that contains more than one file (for a workflow with one input) or a file mapping that contains more than one file pair (for a workflow with two inputs)
4. Launch analysis

Observed results

Analysis fails with the following error messages:
Celery log

2016-02-25 15:24:18 DEBUG    galaxy_connector.galaxy_workflow:529 configure_workflow() - Configuring Galaxy workflow
2016-02-25 15:24:18 DEBUG    galaxy_connector.galaxy_workflow:553 configure_workflow() - Workflow processing: EXPANSION
2016-02-25 15:24:18 DEBUG    galaxy_connector.galaxy_workflow:94 createStepsAnnot() - Creating workflow steps annotation
2016-02-25 15:24:18 ERROR    core.models:1012 prepare_galaxy() - Preparing Galaxy analysis failed: error importing workflow into Galaxy for analysis 'AWS Test workflow: SPP analog 2016-2-25@15:24:06': Unexpected response from galaxy: 400
2016-02-25 15:24:18 ERROR    analysis_manager.tasks:110 run_analysis() - Analysis 'AWS Test workflow: SPP analog 2016-2-25@15:24:06 - guest - None provided.' failed during preparation in Galaxy

Galaxy log

134.174.183.106 - - [25/Feb/2016:20:24:18 +0000] "POST /api/workflows/upload?key=<redacted> HTTP/1.0" 400 - "-" "python-requests/2.7.0 CPython/2.7.6 Linux/3.13.0-49-generic"

Expected results

Analysis runs successfully with no errors logged.

Notes

This issue does not occur with the latest version of galaxy-central-hbc fork.

[scottx611x]

This bug has been addressed as of commit: 9d2873b

Note: there is a function createStepsCompact within core/galaxy_workflow.py that may need this change as well, but not if we migrate to using dataset collections used within newer Galaxy versions.