From: Matt S Trout <mst@shadowcat.co.uk>
Date: Thu, 11 Oct 2012 15:27:46 +0000 (+0100)
Subject: separate to_sql mechanism
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=d605d949f67550fb33e7c52fc73e236fa8d4ab94;p=dbsrgits%2FData-Query.git

separate to_sql mechanism
---

diff --git a/t/example.t b/t/example.t
index 4ccc2a6..4458a8b 100644
--- a/t/example.t
+++ b/t/example.t
@@ -1,42 +1,27 @@
 use strictures;
-use Data::Query::ExprDeclare;
-use Data::Query::Renderer::SQL::Naive;
-use Moo::Role ();
 use Devel::Dwarn;
 
-sub make_renderer {
-  my $class = do {
-    if ($_[0]) {
-      Moo::Role->create_class_with_roles(
-        'Data::Query::Renderer::SQL::Naive',
-        "Data::Query::Renderer::SQL::Slice::$_[0]"
-      )
-    } else {
-      'Data::Query::Renderer::SQL::Naive'
-    }
-  };
-  $class->new;
-}
-
-my $renderer = make_renderer;
+BEGIN { require 't/example.to_sql' };
 
-sub to_sql {
-  my ($sql, @bindp) = @{$renderer->render($_[0])};
-  ($sql, map $_->{value}, @bindp);
-}
+make_renderer;
 
 DwarnL to_sql(SELECT { $_->foo, "bar" });
 DwarnL to_sql(SELECT { $_->foo, "bar" } FROM { $_->baz });
 DwarnL to_sql(SELECT { $_->foo } FROM { $_->baz, AS('quux') });
 DwarnL to_sql(
-  SELECT { $_->cd->name } FROM { $_->cds, AS('cd') } JOIN { $_->artists }
+  SELECT { $_->cd->name } FROM { $_->cds, AS('cd') }
 );
-DwarnL to_sql(
+
+my $w_join =
   SELECT { $_->cd->name }
   FROM { $_->cds, AS 'cd' }
   JOIN { $_->artists, AS 'artist' }
-    ON { $_->cd->artistid eq $_->artist->id }
-);
+    ON { $_->cd->artistid eq $_->artist->id };
+
+DwarnL to_sql($w_join);
+
+Dwarn to_sql(FROM { $w_join } WHERE { $_->cd->year > 2000 });
+
 DwarnL to_sql(
   SELECT { $_->artist->name }
   FROM { $_->artists, AS 'artist' }
@@ -77,15 +62,15 @@ my $lo =
 
 sub render_orders {
 
-  $renderer = make_renderer('LimitOffset');
+  make_renderer('LimitOffset');
 
   DwarnL to_sql($lo);
 
-  $renderer = make_renderer('RowNum');
+  make_renderer('RowNum');
 
   DwarnL to_sql($lo);
 
-  $renderer = make_renderer('RowNumberOver');
+  make_renderer('RowNumberOver');
 
   DwarnL to_sql($lo);
 
@@ -103,3 +88,10 @@ $lo =
   LIMIT { 10 } OFFSET { 20 };
 
 render_orders();
+
+my @cols = qw(name year genre);
+
+DwarnL to_sql(
+  SELECT { my $cd = $_->cd; map $cd->$_, @cols }
+  FROM { $_->cds, AS 'cd' }
+);
diff --git a/t/example.to_sql b/t/example.to_sql
new file mode 100644
index 0000000..a20124f
--- /dev/null
+++ b/t/example.to_sql
@@ -0,0 +1,27 @@
+use strictures;
+use Data::Query::ExprDeclare;
+use Data::Query::Renderer::SQL::Naive;
+use Moo::Role ();
+
+my $renderer;
+
+sub make_renderer {
+  my $class = do {
+    if ($_[0]) {
+      Moo::Role->create_class_with_roles(
+        'Data::Query::Renderer::SQL::Naive',
+        "Data::Query::Renderer::SQL::Slice::$_[0]"
+      )
+    } else {
+      'Data::Query::Renderer::SQL::Naive'
+    }
+  };
+  $renderer = $class->new;
+}
+
+sub to_sql {
+  my ($sql, @bindp) = @{$renderer->render($_[0])};
+  ($sql, map $_->{value}, @bindp);
+}
+
+1;