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    <p>If I did understand: An author can write / comment an article which is about one (only one?) product having a description and other properties, so I guess we should have something like this</p> <pre><code>class products(db.Model): name_product = db.StringProperty() # For Example description_product = db.StringProperty() # For Example class article(db.Model): my_product = db.ReferenceProperty(products, required=True) # Properties of the article title = db.StringProperty() body = db.TextProperty() author = db.StringProperty() aside = db.StringProperty() comment = db.StringProperty() date = db.DateProperty(auto_now_add=True) </code></pre> <p>In the case where one article would concern several products, then you may create another db model for mapping the articles and products. Since several products can be mentionned in several article, we would have:</p> <pre><code>class products(db.Model): name_product = db.StringProperty() # For Example description_product = db.StringProperty() # For Example class article(db.Model): # Properties of the article title = db.StringProperty() body = db.TextProperty() author = db.StringProperty() aside = db.StringProperty() comment = db.StringProperty() date = db.DateProperty(auto_now_add=True) class map_Article_Products(db.Model): my_article = db.ReferenceProperty(article, required=True) my_product = db.ReferenceProperty(products, required=True) </code></pre> <p><em><strong>Note that the db model "article" changes in this case</em></strong></p>
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    1. CONot exactly. In fact, Articles are just the news contain into a slideshow zone, so the body is only a short text. And Products are the product description, but the pattern of a product is the same that for articles. Except that the body is more longer than 500 chars so it's a TextProperty.
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