我曾尝试在Windows 7（x64）上安装mysql，但输出错误：
Failed to build gem native extension.
答案 0 :(得分：0)
1：在Gemfile中添加<EntityType Name="Supplier">
<Key>
<PropertyRef Name="SupplierID" />
</Key>
<Property xmlns:p6="http://schemas.microsoft.com/ado/2009/02/edm/annotation" Name="SupplierID" Type="Edm.Int32" Nullable="false" p6:StoreGeneratedPattern="Identity" />
<Property Name="CompanyName" Type="Edm.String" Nullable="false" MaxLength="40" FixedLength="false" Unicode="true" />
<Property Name="ContactName" Type="Edm.String" MaxLength="30" FixedLength="false" Unicode="true" />
<Property Name="ContactTitle" Type="Edm.String" MaxLength="30" FixedLength="false" Unicode="true" />
<Property Name="Address" Type="Edm.String" MaxLength="60" FixedLength="false" Unicode="true" />
<Property Name="City" Type="Edm.String" MaxLength="15" FixedLength="false" Unicode="true" />
<Property Name="Region" Type="Edm.String" MaxLength="15" FixedLength="false" Unicode="true" />
<Property Name="PostalCode" Type="Edm.String" MaxLength="10" FixedLength="false" Unicode="true" />
<Property Name="Country" Type="Edm.String" MaxLength="15" FixedLength="false" Unicode="true" />
<Property Name="Phone" Type="Edm.String" MaxLength="24" FixedLength="false" Unicode="true" />
<Property Name="Fax" Type="Edm.String" MaxLength="24" FixedLength="false" Unicode="true" />
<Property Name="HomePage" Type="Edm.String" MaxLength="Max" FixedLength="false" Unicode="true" />
<NavigationProperty Name="Products" Relationship="NorthwindModel.FK_Products_Suppliers" ToRole="Products" FromRole="Suppliers" />
</EntityType>
2：删除gem 'mysql2'
3：运行Gemfile.lock
会工作!!!
答案 1 :(得分：0)
您必须安装mysql客户端库：