AddArticle handle and add article.

AddToOption will add option to DB `option` table, return boolean value.

ArticleByID will return article by ID.

ArticleExist if article exist.

ArticlesByPage handle articles by page number.

ArticlesCount return count number.

DeleteOptionByName will delete an Option by 'option_name'.

GetAllOptions return all options.

GetOptionByName return an Option by 'option_name' if it exist Not including 'option_id'.

OptionExist if the option_name of option exist If `true`, this option already exists.

UpdateOptionByName will update an option by 'option_name' If result returned is `true`, update option data successful.

Article model.

Option model, optional informations.