Drupal CMS Flashcards

Question

How do we validate input in drupal using hook_validate?

Answer 1

We use the variable $form_state that has been passed through the hook_form function. $form_state is an associative array with a value for each form field that has been set. We can use the validate function as a place to check the content of each of our fields and use form_set_error(error name, notification string)

Answer 2

using the hook_submit function we can process input that has been validated. We can use the database_insert function to create a new tuple in our database table. we create an associative array called fields, that contains each of the table headings we created in our schema, and is filled with $form_state[value] and then use the execute() function.

Answer 3

using the hook_submit function we can process input that has been validated. We can use the database_insert function to create a new tuple in our database table. we create an associative array called fields, that contains each of the table headings we created in our schema, and is filled with $form_state[value] and then use the execute() function.

Answer 4

Drupal provides a database abstraction layer to provide developers with the ability to support multiple database servers easily. The intent of this layer is to preserve the syntax and power of SQL as much as possible, but also allow developers a way to leverage more complex functionality in a unified way. It also provides a structured interface for dynamically constructing queries when appropriate, and enforcing security checks and similar good practices. The system is built atop PHP's PDO (PHP Data Objects) database API and inherits much of its syntax and semantics. Most Drupal database SELECT queries are performed by a call to db_query() or db_query_range(). Module authors should also consider using the PagerDefault Extender for queries that return results that need to be presented on multiple pages

Answer 5

Drupal provides a database abstraction layer to provide developers with the ability to support multiple database servers easily. The intent of this layer is to preserve the syntax and power of SQL as much as possible, but also allow developers a way to leverage more complex functionality in a unified way. It also provides a structured interface for dynamically constructing queries when appropriate, and enforcing security checks and similar good practices. The system is built atop PHP's PDO (PHP Data Objects) database API and inherits much of its syntax and semantics. Most Drupal database SELECT queries are performed by a call to db_query() or db_query_range(). Module authors should also consider using the PagerDefault Extender for queries that return results that need to be presented on multiple pages

Answer 6

Presentation–abstraction–control (PAC) is a software architectural pattern. It is an interaction-oriented software architecture, a it separates an interactive system into three types of components responsible for specific aspects of the application's functionality. The abstraction component retrieves and processes the data, the presentation component formats the visual and audio presentation of data, and the control component handles things such as the flow of control and communication between the other two components. PAC is used as a hierarchical structure of agents, each consisting of a triad of presentation, abstraction and control parts. The agents (or triads) communicate with each other only through the control part of each triad. Within each triad, it completely insulates the presentation and the abstraction. This provides the option to separately multithread the model and view which can give the user experience of very short program start times, as the user interface (presentation) can be shown before the abstraction has fully initialized.

Answer 7

Presentation–abstraction–control (PAC) is a software architectural pattern. It is an interaction-oriented software architecture, a it separates an interactive system into three types of components responsible for specific aspects of the application's functionality. The abstraction component retrieves and processes the data, the presentation component formats the visual and audio presentation of data, and the control component handles things such as the flow of control and communication between the other two components. PAC is used as a hierarchical structure of agents, each consisting of a triad of presentation, abstraction and control parts. The agents (or triads) communicate with each other only through the control part of each triad. Within each triad, it completely insulates the presentation and the abstraction. This provides the option to separately multithread the model and view which can give the user experience of very short program start times, as the user interface (presentation) can be shown before the abstraction has fully initialized.

Answer 8

Returns a persistent variable. Case-sensitivity of the variable_* functions depends on the database collation used. To avoid problems, always use lower case for persistent variable names. Parameters: $name: The name of the variable to return. $default: The default value to use if this variable has never been set. Return value: The value of the variable. Unserialization is taken care of as necessary.

Answer 9

Unsets a persistent variable. Case-sensitivity of the variable_* functions depends on the database collation used. To avoid problems, always use lower case for persistent variable names. Parameters: $name: The name of the variable to undefine.

Answer 10

Sets a persistent variable. Case-sensitivity of the variable_* functions depends on the database collation used. To avoid problems, always use lower case for persistent variable names. Parameters: $name: The name of the variable to set. $value: The value to set. This can be any PHP data type; these functions take care of serialization as necessary.

Answer 11

When retrieving, updating or removing data from our database