¿Cómo se utiliza el nombre de la columna en la consulta de propulsión?

How is column name used in propel query?

Propel uses the column name in conjunction with the schema to determine the column type. In this case, published_at is defined in the schema as a TIMESTAMP. Then, Propel ‘‘binds’’ the value to the condition using the column type.

When a termination method like find () is called, Propel builds the SQL code and executes it. The previous example generates the following code when find () is called: Propel uses the column name in conjunction with the schema to determine the column type. In this case, published_at is defined in the schema as a TIMESTAMP.

From this schema, Propel generates PHP classes, called “model classes”, made of object-oriented PHP code optimized for a given RDMBS. The model classes are the primary interface to find and manipulate data in the database in Propel. The XML schema can also be used to generate SQL code to setup your database.

The initial step in every Propel project is the “build”. During build time, a developer describes the structure of the datamodel in a XML file called the “schema”. From this schema, Propel generates PHP classes, called “model classes”, made of object-oriented PHP code optimized for a given RDMBS.

Propel’s Query classes make it easy to write queries of any level of complexity in a simple and reusable way. Propel proposes an object-oriented API for writing database queries. That means that you don’t need to write any SQL code to interact with the database. Object orientation also facilitates code reuse and readability.

Propel queries are made of method calls that return the current query object – filterByPublishedAt () and orderByTitle () return the current query augmented with conditions. find (), on the other hand, is a ‘‘termination method’’ that doesn’t return the query, but its result – in this case, a collection of Book objects.

1. Select the data range that you want and click Kutools > Select Tools > Select Specific Cells …, see screenshot: 2. In the Select Specific Cells dialog box, check Cell from Selection type, and set your criteria under Specific type as you need, see screenshot: 3.

The Root instance returned from the CriteriaQuery.from method references the type of the entity provided in the parameter. In this case, it is the Student entity. In order to return a single value from the criteria query for each row, we have to provide a Path instance which refers to the attribute to be selected.