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# NoSqlMigrator | ||
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NoSqlMigrator is a migration framework for .NET, similar to Ruby on Rails Migrations, but heavily inspired by [FluentMigrator](https://github.com/fluentmigrator/fluentmigrator) (though it is NOT a fork or extension to that project). | ||
Migrations are a structured way to alter your database ~~schema~~ structure/organization and are an alternative to creating lots of scripts that have to be run manually by every developer involved. Migrations solve the problem of evolving a database for multiple instances of that databases (for example, the developer's local database, the test database and the production database). Database changes are described in classes written in C# that can be checked into a version control system. | ||
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This project is VERY new, but if you have suggestions or improvements (even small things!), they are all very welcome. | ||
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Right now this tool ONLY supports Couchbase | ||
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# Powered By | ||
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* JetBrains Rider | ||
* Couchbase (.NET SDK) | ||
* NUnit | ||
* Oakton | ||
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# How to use it | ||
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If you've used FluentMigrator before, this should be very familiar. | ||
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1. Create a new C# class library project, add NoSqlMigrator from NuGet. | ||
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2. Create a series of classes (you will likely start with just one, and add them as you need to in future commits). | ||
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3. Compile that library into a DLL file. | ||
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4. Execute the migrations on that DLL file (you can use the NoSqlMigration.Runner, available in the Releases, or you can use the `MigrationRunner` class, and execute the runner from your own code. I'd recommend sticking to the CLI runner). | ||
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## Classes | ||
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Here is an example of a migration. | ||
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``` | ||
[Migration(1)] | ||
public class Migration001_CreateInitialScopeAndCollection : Migrate | ||
{ | ||
public override void Up() | ||
{ | ||
Create.Scope("myScope") | ||
.WithCollection("myCollection1"); | ||
} | ||
public override void Down() | ||
{ | ||
Delete.Scope("myScope"); | ||
} | ||
} | ||
``` | ||
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Each class should inherit from `Migrate`. Each class should have a `Migration(...)` attribute. Typically you would number these sequentially (e.g. 1 for your first migration, 2 for the one you create next week, etc). They don't HAVE to be exactly sequential--you could make the first one 100 and the second one 200 if you'd like. | ||
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Each class has an "up" and a "down". | ||
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"Up" is responsible for making a change. In the above example, it will create a new scope (and create a new collection within that scope). | ||
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"Down" is responsible for _reversing_ that change, which is useful if you need to return to previous versions or undo what you're working on. Note that not everything can be neatly "down"ed. | ||
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## Migration actions | ||
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The migrations within Up and Down use a fluent syntax: Create... Delete... Execute... Update... and so on. | ||
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There may be more than one way to do things: for instance, the above example creates a scope and puts a collection in it. You could also just create the scope, and separately run `Create.Collection("...")`. Or you could `Execute.Sql("...")` with the raw SQL++ to create the collection. | ||
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## Actions currently available | ||
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* Create.Scope | ||
* Create.Collection | ||
* Create.Index | ||
* Delete.Scope | ||
* Delete.Collection | ||
* Delete.FromCollection | ||
* Delete.Index | ||
* Insert.IntoCollection | ||
* Execute.Sql | ||
* Update.Document | ||
* Update.Collection | ||
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Each has various optional and required extensions. This is meant to be a fluent interface, so Intellisense will help a lot. You can also refer to the test migrations in the NoSqlMigrator.Tests project (until better documentation comes along). |