query parts progress

demo/main.cpp

@@ -61,26 +61,97 @@ int main()
 
   std::string dns{"sqlite://demo.db"};
 //  std::string dns{"memory://test"};
-  auto s = std::make_shared<schema>();
+  auto s = std::make_shared<schema>("main");
   s->attach<author>("authors");
   s->attach<book>("books");
 
-  connection c(dns, s);
+  connection c(dns);
+  c.open();
 
-  auto books = c.query()
-    .select<book>({qh::authors.first_name})
+  auto create_authors_sql = c.query(s)
+    .create()
+    .table<author>(qh::authors)
+//    .str();
+    .execute();
+
+  c.query(s).create().table<book>(qh::books).execute();
+
+  std::cout << "SQL: " << create_authors_sql << "\n";
+
+  auto mc = make_entity<author>();
+  mc->id = 1;
+  mc->first_name = "Michael";
+  mc->last_name = "Crichton";
+  mc->date_of_birth = "19.8.1954";
+  mc->year_of_birth = 1954;
+  mc->distinguished = true;
+  auto insert_authors_sql = c.query(s)
+    .insert()
+    .into<author>(qh::authors)
+    .values(*mc)
+    .execute();
+//    .str();
+
+  std::cout << "SQL: " << insert_authors_sql << "\n";
+
+  auto result = c.query(s)
+    .select<author>()
+    .from(qh::authors)
+    .fetch_all();
+
+  for (const auto &row : result) {
+    std::cout << "Author " << row.at(qh::authors.first_name) << "\n";
+  }
+
+  auto update_authors_sql = c.query(s)
+    .update(qh::authors)
+    .set({{qh::authors.first_name, "Stephen"}, {qh::authors.last_name, "King"}})
+    .where(qh::authors.last_name == "Crichton")
+    .execute();
+//    .str();
+
+  std::cout << "SQL: " << update_authors_sql << "\n";
+
+  auto authors = c.query(s)
+    .select<author>()
+    .from(qh::authors)
+    .fetch_all<author>();
+
+  for (const auto &a : authors) {
+    std::cout << "Author " << a.first_name << "\n";
+  }
+
+  c.query(s)
+    .insert()
+    .into<book>(qh::books)
+    .values({2, "It", mc->id, 1980})
+    .execute();
+
+  c.query(s)
+    .insert()
+    .into<book>(qh::books)
+    .values({3, "Misery", mc->id, 1984})
+    .execute();
+
+  auto select_books_sql = c.query(s)
+    .select<book>({qh::authors.last_name})
     .from(qh::books)
     .join_left(qh::authors)
     .on(qh::books.author_id == qh::authors.id)
-    .where(qh::books.published_in < 2008 && qh::authors.first_name == "Michael Crichton")
+    .where(qh::books.published_in < 2008 && qh::authors.last_name == "King")
+    .group_by(qh::books.published_in)
     .order_by(qh::books.title).asc()
-    .offset(2)
-    .limit(5)
-    .str();
+//    .offset(2)
+//    .limit(5)
+//    .str();
+    .fetch_all();
 //    .fetch_all<book>();
 
-  std::cout << "SQL: " << books << "\n";
+//  std::cout << "SQL: " << select_books_sql << "\n";
 
+  for (const auto &r : select_books_sql) {
+    std::cout << "R: " << r.at(qh::books.title) << ", " << r.at(qh::authors.last_name) << "\n";
+  }
   // SELECT book.title, book.id, book.author_id, book.published_in, author.name
   // FROM book
   // INNER JOIN author ON book.author_id = author.id
@@ -88,7 +159,6 @@ int main()
   // ORDER BY "book.title" ASC
   // OFFSET 2 LIMIT 5
 
-
 //  char var[1024];
 //  size_t len{};
 //  const auto error = getenv_s(&len, var, 1024, env_var.c_str());
@@ -97,5 +167,16 @@ int main()
 //  } else {
 //    std::cout << "env var: " << var << "\n";
 //  }
+
+  c.query(s).drop().table(qh::books).execute();
+
+  auto drop_authors_sql = c.query(s)
+    .drop()
+    .table(qh::authors)
+//    .str();
+    .execute();
+
+  std::cout << "SQL: " << drop_authors_sql << "\n";
+
   return 0;
 }