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POHow to get mysql char column type from C# Entity Framework Code First Model
 

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  1. POHow to get mysql char column type from C# Entity Framework Code First Model
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    <p>I have just done the equivalent of Hello World by creating an Entity Framework Code First model (I have written other C# programs but not with Entity Framework). I created a model like this:</p> <pre><code>class Preferences { [Key] public string StationName { get; set; } [MaxLength(30)] public string MainDatabase { get; set; } [MaxLength(30)] public string DefaultSequence { get; set; } } </code></pre> <p>and then had a little routine to add a record</p> <pre><code>var newPrefs = new Preferences { StationName = "MATT", DefaultSequence = "NONE", MainDatabase = "NONE" }; Preferences prefs = foo.Preferences.Add(newPrefs); </code></pre> <p>which then tries to create the database and fails when adding the primary key with the error </p> <pre><code>"BLOB/TEXT column 'StationName' used in key specification without a key length" </code></pre> <p>because it uses the data type "mediumtext" instead of CHAR or VARCHAR and MySQL can't use that type for a key. </p> <p>Is there a method that is still more-or-less database agnostic that will tell MySQL to use the preferred type for the key column? Or do I just have to give up and make an integer key?</p> <p>I also tried variations of the design like this but nothing worked.</p> <pre><code>class Preferences { [Key,DataType("CHAR"),StringLength(30)] public string StationName { get; set; } [MaxLength(30)] public string MainDatabase { get; set; } [MaxLength(30)] public string DefaultSequence { get; set; } } </code></pre> <p>Thanks for your help.</p>
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