Posts (page 11)
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7 min readIn Laravel, to set two columns as a primary key in a database table, you need to define the primary key in your migration file using the primary() method on the schema builder. You can pass an array of column names to the primary() method to set multiple columns as the primary key.
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7 min readIn Laravel, you can regenerate the session ID and token for an authenticated user by calling the Session::migrate() method. This method will create a new session ID and regenerate the CSRF token for the user. By regenerating the session, you can help prevent session fixation attacks and enhance the security of your application.You can use this method to regenerate the user's session at any point in your controller or middleware by calling Session::migrate().
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4 min readTo add a custom validation method in Laravel, you can create a new Validator rule by extending the Validator class. You can do this by creating a new service provider or adding the custom validation method directly in the boot() method of your app service provider.In the custom validation method, you will define the logic for validating the input data based on your specific requirements.
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3 min readIn Laravel, you can easily display the file names before submitting a form by using JavaScript. You can create an event listener for the file input field and then retrieve the selected file names when a file is selected. This way, you can dynamically display the selected file names on the page before the form is submitted. This provides a better user experience as users can see which files they have selected before completing the form submission.
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5 min readTo check if a cookie exists in Laravel, you can use the has method provided by the Request object. You can access the Request object within your controller by type-hinting it in your method signature. Then, you can use the has method to check if a specific cookie exists by passing the name of the cookie as an argument. If the cookie exists, the has method will return true, otherwise, it will return false. This way, you can easily determine if a cookie is present in the current request.
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6 min readIn Laravel, you can access a method without creating an object by using the static keyword in the method declaration. By defining a method as static, you can call it directly on the class without having to instantiate an object first. This can be useful for utility methods or functions that do not require an instance of the class. Additionally, you can also use the double colon (::) syntax to call static methods directly on a class without creating an object.
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8 min readIn Laravel, the error "column name is not in a group by" typically occurs when trying to retrieve a column that is not included in the GROUP BY clause or an aggregate function.To fix this error, you can either include the column in the GROUP BY clause or use an aggregate function such as SUM, COUNT, AVG, etc. to perform calculations on the column.
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4 min readTo update an array field in Laravel, you can use the update method on the model and pass in the new array of values. For example, if you have a model called User with a field called roles that is an array, you can update it like this: $user = User::find(1); $user->update([ 'roles' => ['admin', 'user'] ]); This will update the roles field for the user with ID 1 to be an array containing 'admin' and 'user'.
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6 min readTo secure the .env file in Laravel, you can start by moving the .env file outside of the web root directory to prevent direct access. You can also restrict file permissions to ensure that only the necessary users or processes have access to read or write the file.Another way to secure the .env file is to encrypt sensitive information within the file using encryption algorithms provided by Laravel or third-party packages.
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7 min readIn Oracle SQL, you can manipulate the "if condition" in a procedure using the IF-THEN-ELSE statement. This statement is used to execute a block of code if a certain condition is met, otherwise it will execute another block of code.To use the IF-THEN-ELSE statement in a procedure, you need to specify the condition that you want to check. If the condition evaluates to true, the code inside the IF block will be executed.
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5 min readTo compare multiple columns in Oracle, you can use the logical operators such as AND, OR, and NOT along with comparison operators like =, <>, >, <, >=, and <=.You can use the SELECT statement to compare multiple columns in a table by specifying the columns you want to compare in the WHERE clause.
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3 min readWriting an Oracle query involves using SQL (Structured Query Language) to retrieve data from an Oracle database. Oracle queries begin with the SELECT statement, followed by the columns to retrieve data from, the table(s) to query, and any conditions to filter the results. The FROM clause specifies the table(s) to query, the WHERE clause filters the results based on specified conditions, and the ORDER BY clause sorts the results.