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<title>Database/Persist/GenericSql/Migration.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE FlexibleContexts #-}</span>
<a name="line-3"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Database</span><span class='hs-varop'>.</span><span class='hs-conid'>Persist</span><span class='hs-varop'>.</span><span class='hs-conid'>GenericSql</span><span class='hs-varop'>.</span><span class='hs-conid'>Migration</span>
<a name="line-4"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>Migration</span>
<a name="line-5"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>parseMigration</span>
<a name="line-6"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>parseMigration'</span>
<a name="line-7"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>printMigration</span>
<a name="line-8"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>getMigration</span>
<a name="line-9"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>runMigration</span>
<a name="line-10"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>runMigrationSilent</span>
<a name="line-11"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>runMigrationUnsafe</span>
<a name="line-12"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>migrate</span>
<a name="line-13"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>commit</span>
<a name="line-14"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>rollback</span>
<a name="line-15"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-16"></a>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Database</span><span class='hs-varop'>.</span><span class='hs-conid'>Persist</span><span class='hs-varop'>.</span><span class='hs-conid'>GenericSql</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Database</span><span class='hs-varop'>.</span><span class='hs-conid'>Persist</span><span class='hs-varop'>.</span><span class='hs-conid'>EntityDef</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Database</span><span class='hs-varop'>.</span><span class='hs-conid'>Persist</span><span class='hs-varop'>.</span><span class='hs-conid'>GenericSql</span><span class='hs-varop'>.</span><span class='hs-conid'>Raw</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>R</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Database</span><span class='hs-varop'>.</span><span class='hs-conid'>Persist</span><span class='hs-varop'>.</span><span class='hs-conid'>Store</span>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Database</span><span class='hs-varop'>.</span><span class='hs-conid'>Persist</span><span class='hs-varop'>.</span><span class='hs-conid'>GenericSql</span><span class='hs-varop'>.</span><span class='hs-conid'>Raw</span> <span class='hs-layout'>(</span><span class='hs-conid'>SqlPersist</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-23"></a><span class='hs-cpp'>#if MIN_VERSION_monad_control(0, 3, 0)</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Trans</span><span class='hs-varop'>.</span><span class='hs-conid'>Control</span> <span class='hs-layout'>(</span><span class='hs-conid'>MonadBaseControl</span><span class='hs-layout'>)</span>
<a name="line-25"></a><span class='hs-cpp'>#define MBCIO MonadBaseControl IO</span>
<a name="line-26"></a><span class='hs-cpp'>#else</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Control</span> <span class='hs-layout'>(</span><span class='hs-conid'>MonadControlIO</span><span class='hs-layout'>)</span>
<a name="line-28"></a><span class='hs-cpp'>#define MBCIO MonadControlIO</span>
<a name="line-29"></a><span class='hs-cpp'>#endif</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Trans</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span> <span class='hs-layout'>(</span><span class='hs-conid'>MonadTrans</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Trans</span><span class='hs-varop'>.</span><span class='hs-conid'>Reader</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Trans</span><span class='hs-varop'>.</span><span class='hs-conid'>Writer</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span><span class='hs-layout'>,</span> <span class='hs-varid'>unless</span><span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-layout'>(</span><span class='hs-conid'>Text</span><span class='hs-layout'>,</span> <span class='hs-varid'>unpack</span><span class='hs-layout'>,</span> <span class='hs-varid'>snoc</span><span class='hs-layout'>)</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span>
<a name="line-38"></a>
<a name="line-39"></a><a name="execute'"></a><span class='hs-definition'>execute'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>PersistValue</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span>
<a name="line-40"></a><span class='hs-definition'>execute'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>R</span><span class='hs-varop'>.</span><span class='hs-varid'>execute</span>
<a name="line-41"></a>
<a name="line-42"></a><a name="Sql"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Sql</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Text</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="CautiousMigration"></a><span class='hs-comment'>-- Bool indicates if the Sql is safe</span>
<a name="line-45"></a><a name="CautiousMigration"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>CautiousMigration</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Bool</span><span class='hs-layout'>,</span> <span class='hs-conid'>Sql</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-46"></a><a name="allSql"></a><span class='hs-definition'>allSql</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CautiousMigration</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Sql</span><span class='hs-keyglyph'>]</span>
<a name="line-47"></a><span class='hs-definition'>allSql</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>snd</span>
<a name="line-48"></a><a name="unsafeSql"></a><span class='hs-definition'>unsafeSql</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CautiousMigration</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Sql</span><span class='hs-keyglyph'>]</span>
<a name="line-49"></a><span class='hs-definition'>unsafeSql</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>allSql</span> <span class='hs-varop'>.</span> <span class='hs-varid'>filter</span> <span class='hs-varid'>fst</span>
<a name="line-50"></a><a name="safeSql"></a><span class='hs-definition'>safeSql</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CautiousMigration</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Sql</span><span class='hs-keyglyph'>]</span>
<a name="line-51"></a><span class='hs-definition'>safeSql</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>allSql</span> <span class='hs-varop'>.</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fst</span><span class='hs-layout'>)</span>
<a name="line-52"></a>
<a name="line-53"></a><a name="Migration"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Migration</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>WriterT</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>(</span><span class='hs-conid'>WriterT</span> <span class='hs-conid'>CautiousMigration</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-conid'>()</span>
<a name="line-54"></a>
<a name="line-55"></a><a name="parseMigration"></a><span class='hs-definition'>parseMigration</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Migration</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span> <span class='hs-conid'>CautiousMigration</span><span class='hs-layout'>)</span>
<a name="line-56"></a><span class='hs-definition'>parseMigration</span> <span class='hs-keyglyph'>=</span>
<a name="line-57"></a> <span class='hs-varid'>liftM</span> <span class='hs-varid'>go</span> <span class='hs-varop'>.</span> <span class='hs-varid'>runWriterT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>execWriterT</span>
<a name="line-58"></a> <span class='hs-keyword'>where</span>
<a name="line-59"></a> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-varid'>sql</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Right</span> <span class='hs-varid'>sql</span>
<a name="line-60"></a> <span class='hs-varid'>go</span> <span class='hs-layout'>(</span><span class='hs-varid'>errs</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Left</span> <span class='hs-varid'>errs</span>
<a name="line-61"></a>
<a name="line-62"></a><a name="parseMigration'"></a><span class='hs-comment'>-- like parseMigration, but call error or return the CautiousMigration</span>
<a name="line-63"></a><span class='hs-definition'>parseMigration'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Migration</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>CautiousMigration</span><span class='hs-layout'>)</span>
<a name="line-64"></a><span class='hs-definition'>parseMigration'</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-65"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseMigration</span> <span class='hs-varid'>m</span>
<a name="line-66"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-67"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>errs</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unlines</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>unpack</span> <span class='hs-varid'>errs</span>
<a name="line-68"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>sql</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>sql</span>
<a name="line-69"></a>
<a name="line-70"></a><a name="printMigration"></a><span class='hs-definition'>printMigration</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>MBCIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Migration</span> <span class='hs-layout'>(</span><span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span>
<a name="line-71"></a><span class='hs-definition'>printMigration</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-72"></a> <span class='hs-varid'>mig</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseMigration'</span> <span class='hs-varid'>m</span>
<a name="line-73"></a> <span class='hs-varid'>mapM_</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftIO</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-varid'>putStrLn</span> <span class='hs-varop'>.</span> <span class='hs-varid'>flip</span> <span class='hs-varid'>snoc</span> <span class='hs-chr'>';'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>allSql</span> <span class='hs-varid'>mig</span><span class='hs-layout'>)</span>
<a name="line-74"></a>
<a name="line-75"></a><a name="getMigration"></a><span class='hs-definition'>getMigration</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>MBCIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Migration</span> <span class='hs-layout'>(</span><span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Sql</span><span class='hs-keyglyph'>]</span>
<a name="line-76"></a><span class='hs-definition'>getMigration</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-77"></a> <span class='hs-varid'>mig</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseMigration'</span> <span class='hs-varid'>m</span>
<a name="line-78"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>allSql</span> <span class='hs-varid'>mig</span>
<a name="line-79"></a>
<a name="line-80"></a><a name="runMigration"></a><span class='hs-definition'>runMigration</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>MBCIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-81"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Migration</span> <span class='hs-layout'>(</span><span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-82"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span>
<a name="line-83"></a><span class='hs-definition'>runMigration</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runMigration'</span> <span class='hs-varid'>m</span> <span class='hs-conid'>False</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-84"></a>
<a name="line-85"></a><a name="runMigrationSilent"></a><span class='hs-comment'>-- | Same as 'runMigration', but returns a list of the SQL commands executed</span>
<a name="line-86"></a><span class='hs-comment'>-- instead of printing them to stderr.</span>
<a name="line-87"></a><span class='hs-definition'>runMigrationSilent</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>MBCIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-88"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Migration</span> <span class='hs-layout'>(</span><span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-89"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-90"></a><span class='hs-definition'>runMigrationSilent</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runMigration'</span> <span class='hs-varid'>m</span> <span class='hs-conid'>True</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="runMigration'"></a><span class='hs-definition'>runMigration'</span>
<a name="line-93"></a> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>MBCIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-94"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Migration</span> <span class='hs-layout'>(</span><span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-95"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-comment'>-- ^ is silent?</span>
<a name="line-96"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Text</span><span class='hs-keyglyph'>]</span>
<a name="line-97"></a><span class='hs-definition'>runMigration'</span> <span class='hs-varid'>m</span> <span class='hs-varid'>silent</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-98"></a> <span class='hs-varid'>mig</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseMigration'</span> <span class='hs-varid'>m</span>
<a name="line-99"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>unsafeSql</span> <span class='hs-varid'>mig</span> <span class='hs-keyword'>of</span>
<a name="line-100"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-varid'>executeMigrate</span> <span class='hs-varid'>silent</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>safeSql</span> <span class='hs-varid'>mig</span>
<a name="line-101"></a> <span class='hs-varid'>errs</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-varid'>concat</span>
<a name="line-102"></a> <span class='hs-keyglyph'>[</span> <span class='hs-str'>"\n\nDatabase migration: manual intervention required.\n"</span>
<a name="line-103"></a> <span class='hs-layout'>,</span> <span class='hs-str'>"The following actions are considered unsafe:\n\n"</span>
<a name="line-104"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>unlines</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>" "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>unpack</span> <span class='hs-varid'>s</span> <span class='hs-varop'>++</span> <span class='hs-str'>";"</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>errs</span>
<a name="line-105"></a> <span class='hs-keyglyph'>]</span>
<a name="line-106"></a>
<a name="line-107"></a><a name="runMigrationUnsafe"></a><span class='hs-definition'>runMigrationUnsafe</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>MBCIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-108"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Migration</span> <span class='hs-layout'>(</span><span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-109"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span>
<a name="line-110"></a><span class='hs-definition'>runMigrationUnsafe</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-111"></a> <span class='hs-varid'>mig</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseMigration'</span> <span class='hs-varid'>m</span>
<a name="line-112"></a> <span class='hs-varid'>mapM_</span> <span class='hs-layout'>(</span><span class='hs-varid'>executeMigrate</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>allSql</span> <span class='hs-varid'>mig</span>
<a name="line-113"></a>
<a name="line-114"></a><a name="executeMigrate"></a><span class='hs-definition'>executeMigrate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Text</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span> <span class='hs-conid'>Text</span>
<a name="line-115"></a><span class='hs-definition'>executeMigrate</span> <span class='hs-varid'>silent</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-116"></a> <span class='hs-varid'>unless</span> <span class='hs-varid'>silent</span> <span class='hs-varop'>$</span> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>hPutStrLn</span> <span class='hs-varid'>stderr</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Migrating: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>unpack</span> <span class='hs-varid'>s</span>
<a name="line-117"></a> <span class='hs-varid'>execute'</span> <span class='hs-varid'>s</span> <span class='hs-conid'>[]</span>
<a name="line-118"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>s</span>
<a name="line-119"></a>
<a name="line-120"></a><a name="migrate"></a><span class='hs-definition'>migrate</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>MBCIO</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>PersistEntity</span> <span class='hs-varid'>val</span><span class='hs-layout'>)</span>
<a name="line-121"></a> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>EntityDef</span><span class='hs-keyglyph'>]</span>
<a name="line-122"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>val</span>
<a name="line-123"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Migration</span> <span class='hs-layout'>(</span><span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-124"></a><span class='hs-definition'>migrate</span> <span class='hs-varid'>allDefs</span> <span class='hs-varid'>val</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-125"></a> <span class='hs-varid'>conn</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>ask</span>
<a name="line-126"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>getter</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>R</span><span class='hs-varop'>.</span><span class='hs-varid'>getStmt'</span> <span class='hs-varid'>conn</span>
<a name="line-127"></a> <span class='hs-varid'>res</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>migrateSql</span> <span class='hs-varid'>conn</span> <span class='hs-varid'>allDefs</span> <span class='hs-varid'>getter</span> <span class='hs-varid'>val</span>
<a name="line-128"></a> <span class='hs-varid'>either</span> <span class='hs-varid'>tell</span> <span class='hs-layout'>(</span><span class='hs-varid'>lift</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tell</span><span class='hs-layout'>)</span> <span class='hs-varid'>res</span>
<a name="line-129"></a>
<a name="line-130"></a><a name="commit"></a><span class='hs-comment'>-- | Perform a database commit.</span>
<a name="line-131"></a><span class='hs-definition'>commit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span>
<a name="line-132"></a><span class='hs-definition'>commit</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-133"></a> <span class='hs-varid'>conn</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>ask</span>
<a name="line-134"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>getter</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>R</span><span class='hs-varop'>.</span><span class='hs-varid'>getStmt'</span> <span class='hs-varid'>conn</span>
<a name="line-135"></a> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>commitC</span> <span class='hs-varid'>conn</span> <span class='hs-varid'>getter</span> <span class='hs-varop'>>></span> <span class='hs-varid'>begin</span> <span class='hs-varid'>conn</span> <span class='hs-varid'>getter</span>
<a name="line-136"></a>
<a name="line-137"></a><a name="rollback"></a><span class='hs-comment'>-- | Perform a database rollback.</span>
<a name="line-138"></a><span class='hs-definition'>rollback</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MonadIO</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span>
<a name="line-139"></a><span class='hs-definition'>rollback</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-140"></a> <span class='hs-varid'>conn</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>SqlPersist</span> <span class='hs-varid'>ask</span>
<a name="line-141"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>getter</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>R</span><span class='hs-varop'>.</span><span class='hs-varid'>getStmt'</span> <span class='hs-varid'>conn</span>
<a name="line-142"></a> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rollbackC</span> <span class='hs-varid'>conn</span> <span class='hs-varid'>getter</span> <span class='hs-varop'>>></span> <span class='hs-varid'>begin</span> <span class='hs-varid'>conn</span> <span class='hs-varid'>getter</span>
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