我有点困惑你的问题，但我会尝试回答
迁移更新数据库和其中的数据。如果您想对仪表板中看到的视图进行更改，您不需要重新运行迁移。
但是，如果您要更改模型和数据，则需要运行更多的迁移或重置数据库并运行创建迁移。
当我重建我正在开发的模块时，它将运行任何未完成的迁移，而无需在本地版本上禁用/启用该模块
也就是说，如果当前迁移版本为1，并且在迁移中有UpdateFrom1方法，则在构建项目时将运行此方法。
您可以在以下表Orchard_Framework_DataMigrationRecord中检查当前版本号
如果您想强制重新运行迁移，则可以重置数据库中表的值。或者您可以在运行整个迁移套件之前备份数据库，并还原。
在开发过程中，我使用短小的迁移，在每次添加数据时创建一个方法，我尽量保持这些小，以便在开发过程中轻松识别任何问题。
然后在完成模块之前，将迁移合并为2或3个逻辑代码块
这是一个自定义类型的迁移示例
public int Create()
{
// Define the project type
ContentDefinitionManager.AlterTypeDefinition("Project", cfg => cfg
.WithSetting("Stereotype", "Content")
.CommomPart()
.AutoroutePart("our-work")
.BodyPart()
.WithPart("TitlePart")
.WithPart("PublishLaterPart")
.WithPart("MenuPart", builder => builder
.WithSetting("MenuPart.OnMenu", "true")
.WithSetting("MenuPart.CurrentMenu", "Project Menu"))
.WithPart("Project")
.Creatable()
.Draftable());
return 1;
}
public int UpdateFrom1()
{
// Define project part - having a part with the same name will create fields in the project type
ContentDefinitionManager.AlterPartDefinition("Project", builder => builder
.MediaPickerField("MainImage")
.MediaPickerField("MediumImage")
.MediaPickerField("SmallImage")
.MediaPickerField("Logo")
.TextField("ShortDescription", Flavour.TextArea)
.TextField("Features", Flavour.Markdown)
.TextField("ClientTitle", Flavour.DefaultFlavour)
.TextField("ClientName", Flavour.DefaultFlavour)
.TextField("ClientQuote", Flavour.Textarea)
.BooleanField("MainProjectOnHomePage", false)
.Attachable());
return 2;
}
我添加了一些扩展方法，使其更简洁。
下面是它们：
public static class MigrationExtentionHelpers
{
// part definitions
public static ContentPartDefinitionBuilder MediaPickerField(this ContentPartDefinitionBuilder builder,
string name, bool required = true, string hint = "")
{
var displayName = SplitCamel(name);
// default implementation of Media picker field - create overloads for more options
return builder.WithField(name, fieldBuilder => fieldBuilder
.OfType("MediaPickerField")
.WithDisplayName(displayName)
.WithSetting("MediaPickerFieldSettings.Required", required.ToString(CultureInfo.InvariantCulture))
.WithSetting("MediaPickerFieldSettings.AllowedExtensions", "jpg png gif")
.WithSetting("MediaPickerFieldSettings.Hint", hint));
}
public static ContentPartDefinitionBuilder TextField(this ContentPartDefinitionBuilder builder,
string name, Flavour flavor, bool required = true, string hint = "")
{
var strFlavor = SplitCamel(flavor.ToString());
// default implementation of Media picker field - create overloads for more options
return builder.WithField(name, fieldBuilder => fieldBuilder
.OfType("TextField")
.WithSetting("TextFieldSettings.Required", required.ToString(CultureInfo.InvariantCulture))
.WithSetting("TextFieldSettings.Flavor", strFlavor)
.WithSetting("TextFieldSettings.Hint", hint));
}
public static ContentPartDefinitionBuilder BooleanField(this ContentPartDefinitionBuilder builder,
string name, bool defalut, string hint = "")
{
// default implementation of Media picker field - create overloads for more options
return builder.WithField(name, fieldBuilder => fieldBuilder
.OfType("BooleanField")
.WithSetting("BooleanFieldSettings.Hint", hint)
.WithSetting("BooleanFieldSettings.DefaultValue", defalut.ToString(CultureInfo.InvariantCulture)));
}
// type definitions
public static ContentTypeDefinitionBuilder AutoroutePart(this ContentTypeDefinitionBuilder builder, string pathPrefix = "")
{
var pattern = string.Format("[{{Name:'{0}/Title', Pattern: '{0}/{{Content.Slug}}', Description: 'my-page'}}]", pathPrefix);
return builder.WithPart("AutoroutePart", partBuilder => partBuilder
.WithSetting("AutorouteSettings.PatternDefinitions", pattern));
}
public static ContentTypeDefinitionBuilder BodyPart(this ContentTypeDefinitionBuilder builder,
Flavour defaultFlavour = Flavour.Markdown)
{
return builder.WithPart("BodyPart", partBuilder => partBuilder
.WithSetting("BodyTypePartSettings.Flavor", defaultFlavour.ToString()));
}
public static ContentTypeDefinitionBuilder CommomPart(this ContentTypeDefinitionBuilder builder)
{
return builder.WithPart("CommonPart")
.WithSetting("OwnerEditorSettings.ShowOwnerEditor", false.ToString(CultureInfo.InvariantCulture).ToLower());
}
private static string SplitCamel(string enumString)
{
StringBuilder sb = new StringBuilder();
char last = char.MinValue;
foreach (char c in enumString)
{
if (char.IsLower(last) && char.IsUpper(c))
{
sb.Append(' ');
sb.Append(c.ToString(CultureInfo.InvariantCulture).ToLower());
}
else
{
sb.Append(c);
}
last = c;
}
return sb.ToString();
}
}
基本上，我所知道的除非从以前创建的备份还原数据库或直接调整它，否则没有办法运行两次迁移。
对于我来说，这不是问题，因为在我的团队开发过程中，我们使用本地数据库实例，并将所有迁移合并为初始迁移，然后部署到测试/暂存环境。