TownID must be specified as the foreign key. The Place struct gets like this: type Place struct { ID int Name string Description string TownID int Town Town } Now there are different approach to handle this. For example: places := []Place{} db.Find(&places) for i, _ := range places { db.Model(places[i]).Related(&places[i].Town) } This will certainly … Read more
Dapper is just a tool. What it does is: make it trivially easy to correctly parameterize queries make it trivially easy to execute queries (scalar, multi-rows, multi-grids, and no-results) make it trivially easy to turn results into objects very efficiently and quickly What it doesn’t do is: generate a class model for you generate queries … Read more
This will work except you can’t use the @0 (ordinal) syntax. You must use named parameters, otherwise it thinks they are individual parameters. var tagsToFind = new string[] { “SqlServer”, “IIS” }; var sql = PetaPoco.Sql.Builder.Select(“*”).From(“Tags”).Where(“Name in (@tags)”, new { tags = tagsToFind }); var result = db.Query<Tag>(sql); This will result in select * from … Read more
I have encountered a similar issue in my project. The way I choose to implement it is a bit different for two reasons: If at one point in time Sequelize decides to implement sub queries – the syntax is ready. Use Sequelize protection against SQL injection. Here is my code snippet, hope it helps. Sequelize … Read more
In my limited experience, things are as you describe–it’s a messy situation and the usual cop-out “it depends” answer applies. A good example would be the online store that I work for. It has a Brand object, and on the main page of the Web site, all of the brands that the store sells are … Read more
ORM = Object-Relational Mapping In an ORM, classes/objects in the application are mapped to database tables and operations for persistence, sometimes automagically. DAL = Data-Access Layer In a DAL, database operations are hidden behind a code facade. An ORM is a kind of DAL, but not all DALs are ORMs.
Suppose your application manages Person objects, with each instance having name, age and jobTitle properties. You would like to persist such objects, retrieve them from the persistence medium and maybe update (say, on their birthday, increment the age) or delete. These tasks are usually referred to as CRUD, from Create, Read, Update and Delete. It … Read more
As stated by the Doctrine Configuration Reference by default logging of the SQL connection is set to the value of kernel.debug, so if you have instantiated AppKernel with debug set to true the SQL commands get stored in memory for each iteration. You should either instantiate AppKernel to false, set logging to false in you … Read more
I can’t access my Vagrant box right now, but I believe this should work: $posts = Post::whereHas(‘categories’, function($q) { $q->where(‘slug’, ‘=’, Input::get(‘category_slug’)); })->get();
“ORM fail to compete against SQL queries for complex queries.” Well both LINQ-SQL and Entity Framework Allow complex queries and even translation of SQL query results into objects. “Developers loose understanding of what the code is actually doing – the developer is more in control using SQL.” Not really, if you know what you are … Read more