Update blog tutorial

1 files changed, 8 insertions, 3 deletions

diff --git a/demos/blog-tutorial/protected/pages/Day2/CreateDB.page b/demos/blog-tutorial/protected/pages/Day2/CreateDB.page
index eebda4c1..de4e2436 100644
--- a/demos/blog-tutorial/protected/pages/Day2/CreateDB.page
+++ b/demos/blog-tutorial/protected/pages/Day2/CreateDB.page
@@ -30,9 +30,11 @@ CREATE TABLE users (
 /* create posts table */

 CREATE TABLE posts (

   post_id       INTEGER NOT NULL PRIMARY KEY,

-  author        VARCHAR(128) NOT NULL,  /* references users.username */

+  author_id     VARCHAR(128) NOT NULL   

+                    CONSTRAINT fk_author REFERENCES users(username),

   create_time   INTEGER NOT NULL,       /* UNIX timestamp */

   title         VARCHAR(256) NOT NULL,  /* title of the post */

+  content       TEXT,                   /* post body */

   status        INTEGER NOT NULL        /* 0: published; 1: draft; 2: pending; 2: denied */

 );

 

@@ -43,14 +45,17 @@ INSERT INTO posts VALUES (NULL, 'admin', 1175708482, 'first post', 'this is my f
 </com:TTextHighlighter>

 

 <com:NoteBox>

-SQLite does not support <a href="http://www.sqlite.org/omitted.html">foreign key constraint</a>. Therefore, we will write PHP code to ensure that the <tt>posts.author</tt> field contains valid data. Also, we are exploiting the fact that the <tt>posts.post_id</tt> field is <a href="http://www.sqlite.org/autoinc.html">auto-incremental</a> if we assign NULL to it.

+SQLite does not support <a href="http://www.sqlite.org/omitted.html">foreign key constraint</a> such that

+the constraints can still be defined but will be ignored by SQLite.

+Therefore, we will write PHP code to ensure that the <tt>posts.author_id</tt> field contains valid data. 

+Also, we are exploiting the fact that the <tt>posts.post_id</tt> field is <a href="http://www.sqlite.org/autoinc.html">auto-incremental</a> if we assign NULL to it.

 </com:NoteBox>

 

 <p>

 We then use the <a href="http://www.sqlite.org/download.html">SQLite command line tool</a> to create the SQLite database. We create a directory <tt>protected/data</tt> to hold the SQLite database file. We now execute the following command under the directory <tt>protected/data</tt>:

 </p>

 

-<com:TTextHighlighter CssClass="source">

+<com:TTextHighlighter CssClass="source cli">

 sqlite3 blog.db < ../schema.sql

 </com:TTextHighlighter>