Add wildcard (*) support to GetMigrations, ScriptMigration, and DropDatabase

src/EFCore.Design/Design/Internal/DbContextOperations.cs

@@ -104,12 +104,33 @@ public virtual void DropDatabase(string? contextType, string? connectionString)
     {
         if (contextType == "*")
         {
-            throw new OperationException(DesignStrings.WildcardNotSupported);
+            var contexts = CreateAllContexts();
+
+            if (!contexts.Any())
+            {
+                throw new OperationException(DesignStrings.NoContext(_assembly.GetName().Name));
+            }
+
+            foreach(var item in contexts)
+            {
+                using (item)
+                {
+                    DropDatabaseContext(item, connectionString);
+                }
+            }
+
+            return;
         }
 
-        using var context = CreateContext(contextType);
+        using (var context = CreateContext(contextType))
+        {
+            DropDatabaseContext(context, connectionString);
+        }
+    }
 
-        if (connectionString != null)
+    private void DropDatabaseContext(DbContext context, string? connectionString)
+    {
+        if (connectionString is not null)
         {
             context.Database.SetConnectionString(connectionString);
         }

src/EFCore.Design/Design/Internal/MigrationsOperations.cs

@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System.Diagnostics.CodeAnalysis;
+using System.Text;
 using Microsoft.EntityFrameworkCore.Internal;
 using Microsoft.EntityFrameworkCore.Migrations.Design;
 using Microsoft.EntityFrameworkCore.Migrations.Design.Internal;
@@ -154,12 +155,36 @@ public virtual IEnumerable<MigrationInfo> GetMigrations(
     {
         if (contextType == "*")
         {
-            throw new OperationException(DesignStrings.WildcardNotSupported);
+            var contexts = _contextOperations.CreateAllContexts();
+
+            if (!contexts.Any())
+            {
+                throw new OperationException(DesignStrings.NoContext(_assembly.GetName().Name));
+            }
+
+            var contextsList = new List<MigrationInfo>();
+            foreach(var item in contexts)
+            {
+                using (item)
+                {
+                    var migrationInfo = GetMigrationsContext(item, connectionString, noConnect);
+                    contextsList.AddRange(migrationInfo);
+                }
+            }
+
+            return contextsList;
         }
 
-        using var context = _contextOperations.CreateContext(contextType);
+        using (var context = _contextOperations.CreateContext(contextType))
+        {
+            return GetMigrationsContext(context, connectionString, noConnect);
+        }
+
+    }
 
-        if (connectionString != null)
+    private IEnumerable<MigrationInfo> GetMigrationsContext(DbContext context, string? connectionString, bool noConnect)
+    {
+        if (connectionString is not null)
         {
             context.Database.SetConnectionString(connectionString);
         }
@@ -209,10 +234,34 @@ public virtual string ScriptMigration(
     {
         if (contextType == "*")
         {
-            throw new OperationException(DesignStrings.WildcardNotSupported);
+            var contexts = _contextOperations.CreateAllContexts();
+
+            if (!contexts.Any())
+            {
+                throw new OperationException(DesignStrings.NoContext(_assembly.GetName().Name));
+            }
+
+            var stringBuilder = new StringBuilder();
+            foreach (var item in contexts)
+            {
+                using (item)
+                {
+                    var script = ScriptMigrationContext(fromMigration, toMigration, options, item);
+                    stringBuilder.Append(script);
+                }
+            }
+
+            return stringBuilder.ToString();
         }
 
-        using var context = _contextOperations.CreateContext(contextType);
+        using (var context = _contextOperations.CreateContext(contextType))
+        {
+            return ScriptMigrationContext(fromMigration, toMigration, options, context);
+        }
+    }
+
+    private string ScriptMigrationContext(string? fromMigration, string? toMigration, MigrationsSqlGenerationOptions options, DbContext context)
+    {
         var services = _servicesBuilder.Build(context);
         EnsureServices(services);