Azure devops deploy - Kabrinskiy Eduard
<h1>Azure devops deploy</h1>
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<h1>Run EF Core Migrations in Azure DevOps</h1>
<p style="clear: both"><img src="
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<p>Entity Framework Core?s code-first approach makes schema management easy with the <em>migrations</em> feature. Just create your models in C# code, then use a simple command to generate the migrations:</p>
<p>When you are ready to apply those migrations to your database, there?s another command:</p>
<p>Your database gets brought up to the latest version?whether that means applying just the most recent migration or two or creating the entire schema.</p>
<h4>EF Core Migrations in Azure DevOps: The Problem</h4>
<p>Given that Microsoft is responsible for creating this support, you might think that the Azure DevOps build and release pipelines would have great support for EF migrations and it would be simple to drop migrations right in. However, the ?dotnet ef? command <em>builds</em> the source so it can apply the database updates. This would be fine if we want to apply the database migrations in the build pipeline. But we don?t want to do that?database update is a deployment activity and belongs in our release pipeline.</p>
<p>There are two problems with that? First, we don?t have ready access to the source in the release pipeline. We would need to package up the source as an artifact of the build so we could pass it over to the the release pipeline. The second problem, that I learned the hard way, is that even with the source available in the release pipeline, building the code there is not quite the same as building in the build pipeline. For example, if you need to access a private NuGet feed within your project, it does not authenticate for you like in a build pipeline.</p>
<h4>Create SQL Script in Build Pipeline</h4>
<p>I went through several different approaches to handling this until I settled on what I think is the cleanest: have your build process generate the migration scripts, package them as artifacts, and run them at deployment time.</p>
<p>My build is run under psake and here is the relevant line:</p>
<p><strong>$stagingDir</strong> is my artifact staging location.<br /><strong>$scriptName</strong> is the name of SQL script we will run during deployment.<br /><strong>$dbContext</strong> is the class name of the DbContext (without namespacing).</p>
<p>Note the <strong>?idempotent</strong> flag. This directs the migration code to generate a script that can be run on an existing database and only apply any missing migrations.</p>
<h4>Run Script in Release Pipeline</h4>
<p>Then, over in my release pipeline add step to run a SQL scripts. My database is Azure SQL:</p>
<p style="clear: both"> <img src="
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<p>Set this task up to find the SQL script we created in the build and run it against the corresponding database.</p>
<h4>Conclusion</h4>
<p>While it?s not as automatic as we might have liked, running EF Core migrations in Azure DevOps is still pretty easy. This approach would work just as well with any combination of build and release tools such as Team City, Octopus Deploy, etc.</p>
<h2>Azure devops deploy</h2>
<h3>Azure devops deploy</h3>
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<h4>Azure devops deploy</h4>
Running EF Core migrations in Azure DevOps is easy & it's possible to use Entity Framework Core's code-first approach to simplify schema management. Learn how.
<h5>Azure devops deploy</h5>
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