Yii2 find one

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. But findOne behaves strangely in the case.

Yii2 find one

Active Record provides an object-oriented interface for accessing and manipulating data stored in databases. An Active Record class is associated with a database table, an Active Record instance corresponds to a row of that table, and an attribute of an Active Record instance represents the value of a particular column in that row. Instead of writing raw SQL statements, you would access Active Record attributes and call Active Record methods to access and manipulate the data stored in database tables. For example, assume Customer is an Active Record class which is associated with the customer table and name is a column of the customer table. You can write the following code to insert a new row into the customer table:. The above code is equivalent to using the following raw SQL statement for MySQL, which is less intuitive, more error prone, and may even have compatibility problems if you are using a different kind of database:. In this tutorial, we will mainly describe the usage of Active Record for relational databases. By default each Active Record class is associated with its database table. You may override this method if the table is not named after this convention. Also a default tablePrefix can be applied. The brackets around the table name are used for quoting in an SQL query. In the following example, we declare an Active Record class named Customer for the customer database table.

The detached behavior. The Definitive Guide to Yii 2.

ActiveRecord is the base class for classes representing relational data in terms of objects. Active Record implements the Active Record design pattern. The object's attributes are mapped to the columns of the corresponding table. Referencing an Active Record attribute is equivalent to accessing the corresponding table column for that record. As an example, say that the Customer ActiveRecord class is associated with the customer table. This would mean that the class's name attribute is automatically mapped to the name column in customer table. In this example, Active Record is providing an object-oriented interface for accessing data stored in the database.

ActiveRecord is the base class for classes representing relational data in terms of objects. Active Record implements the Active Record design pattern. The object's attributes are mapped to the columns of the corresponding table. Referencing an Active Record attribute is equivalent to accessing the corresponding table column for that record. As an example, say that the Customer ActiveRecord class is associated with the customer table.

Yii2 find one

The latter is invoked by the former implicitly when you call one of the query methods. All the query building methods return the query object itself, which allows you to chain multiple calls together. You can specify columns to be selected in either an array or a string, like the following.

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Sign up for free to join this conversation on GitHub. It is not meant to be used for creating new records directly. A nested relation is a relation that is declared within a related Active Record class. User Contributed Notes 1. Note: The Active Record attributes are named after the associated table columns in a case-sensitive manner. Whether to append new event handler to the end of the existing handler list. See also: safeAttributes attributes. Whether the assignments should only be done to the safe attributes. Assume you need to display a list of customers with the count of orders they have made. The fields being requested for exporting. Note that the name is case sensitive. List of behaviors to be attached to the component. But findOne behaves strangely in the case. If beforeSave returns false , the rest of the steps will be skipped; save the record into database. If null is returned default implemented , optimistic locking will not be supported.

These methods can be chained together.

You have to make sure that the model is really related with the current model as this method does not check this. Yii ActiveRecord looks brilliantly simple and effective for drastically reducing the amount of custom SQL one has to write. These events are especially useful when you are developing Active Record behaviors which need to customize Active Record life cycles. Note, that the data being populated is subject to the safety check by setAttributes. Already have an account? When the select query doesn't provide the volume, the model will be able to calculate it automatically using the attributes of the model. To save attribute value to an array column, ActiveRecord will automatically create an ArrayExpression object that will be encoded by QueryBuilder to an PgSQL string representation of array. If you need to specify more complex conditions, use find in combination with where instead. While retrieving data in terms of Active Record objects is convenient and flexible, it is not always desirable when you have to bring back a large amount of data due to the big memory footprint. The array values should be error messages. Only when field names to be expanded are explicitly specified when calling toArray , will their values be exported. The latter approach is much cleaner and drier, though. Please refer to fields on the format of the return value. By default, an active attribute is considered safe and can be massively assigned.