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POTSQL Insert Data Linked by Foreign Key
 

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    <p>Let's say I have two tables</p> <p><strong>RDB_DataEntities</strong></p> <pre><code>DataEntityId Name Created Modified ... </code></pre> <p><strong>RDB_DataInstances</strong></p> <pre><code>DataInstanceId DataEntityId </code></pre> <p>So <code>RDB_DataInstances</code> is joined to <code>RDB_DataEntities</code> via a foreign key on their <code>DataEntityId</code> columns.</p> <p>Let's say I want to insert data into both tables in the same transaction. The code I have for this is as follows:</p> <pre><code>using (var con = new SqlConnection("data source=speedy;initial catalog=mydb;user id=myuser;password=mypass")) { con.Open(); using (var tran = con.BeginTransaction()) { SqlCommand i1 = new SqlCommand("insert into RDB_DataEntities (Name,IsSchema,Created,Modified,RequireCaptcha,UniqueByEmail,UniqueByMac) values ('hi',0,GetDate(),GetDate(),0,0,0)", con, tran); i1.ExecuteNonQuery(); SqlCommand i2 = new SqlCommand("select SCOPE_IDENTITY() as newid", con, tran); var id = int.Parse(i2.ExecuteScalar().ToString()); SqlCommand i3 = new SqlCommand("insert into RDB_DataInstances (DataEntityId) values (" + id + ")", con, tran); i3.ExecuteScalar(); tran.Commit(); } } </code></pre> <p>Why is it throwing a foreign key error </p> <blockquote> <p>The INSERT statement conflicted with the FOREIGN KEY constraint 'FK_RDB_DataInstances_RDB_DataEntities'. The conflict occurred in database 'NMSS_CMS', table 'dbo.RDB_DataEntities', column 'DataEntityId'.</p> </blockquote> <p>Shouldn't the transaction know that I am inserting the foreign key based upon an insert I just did within the current transaction context? Am I way off?</p> <p>How do you make this happen?</p>
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    1. USMicah
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    1. COIt's not happening on your first `INSERT` is it? That is, you haven't set up the FK the wrong way around...
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      1. USta.speot.is
 

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