add-migration : Cannot bind argument to parameter 'Path' because it is an empty string

Question

I'm running default api core project on Visual studio 2017 with docker support and I got this error everytime I run the command add-migration -name name

add-migration : Cannot bind argument to parameter 'Path' because it is an empty string. At line:1 char:1 + add-migration + ~~~~~~~~~~~~~ + CategoryInfo : InvalidData: (:) [Add-Migration], ParameterBindingValidationException + FullyQualifiedErrorId : ParameterArgumentValidationErrorEmptyStringNotAllowed,Add-Migration

PS : This command works without docker support, but return this error when I add docker support

Thomas Eyde · Accepted Answer · 2018-01-05 10:01:04Z

20

~~It looks like you're hitting issue #7540. For now, put your project on a "physical" drive instead of a network file share.~~ (Scratch that. You're using the PMC commands.)

You're probably hitting issue #7439. Make sure your app is selected as the startup project (or use the -StartupProject parameter) when running the commands.

edited Jan 5, 2018 at 10:01

Thomas Eyde

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answered Mar 8, 2017 at 18:01

bricelam

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2 Comments

Hayha Over a year ago

You're totally right, since i add docker support, i have another project "docker-compose" added to my solution, setting my first project as a start up project fixed the problem, thank you @bricelam

Bob Tabor Over a year ago

@bricelam Admittedly this will be nit-picky, but now that Docker support is so prominent on the new asp.net project dialog, the decision to make Docker the default project doesn't feel desirable.

Anthony Griggs · Accepted Answer · 2019-10-28 14:12:40Z

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I tried many suggested solutions and none seemed to work except for this: https://stackoverflow.com/a/58592444/1819403

answered Oct 28, 2019 at 14:12

Anthony Griggs

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Comments

Markus · Accepted Answer · 2019-11-22 14:30:57Z

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It would be interesting to know with which version of Entity Framework this error occurred. I had the same error with EF 6.3.0 and I am not using docker at all.

The solution for me was to go back to version 6.2.0 and create the migration with it.

answered Nov 22, 2019 at 14:30

Markus

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