Available validation rules in Laravel - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to require the 'email' field to be a valid email address.

Laravel

'email' => '[1]',

Drag options to blanks, or click blank then click option'

Astring

Bnullable|email

Crequired|numeric

Drequired|email

Attempts:

3 left

💡 Hint

Common Mistakes

Using only 'email' without 'required' allows empty input.

Using 'numeric' instead of 'email' causes validation failure.

The required|email rule ensures the field is present and formatted as an email.

2fill in blank

medium

Complete the code to validate that the 'age' field is an integer and at least 18.

Laravel

'age' => '[1]',

Drag options to blanks, or click blank then click option'

Anumeric|max:18

Bstring|min:18

Cinteger|min:18

Drequired|email

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'string' instead of 'integer' causes type mismatch.

Using 'max:18' instead of 'min:18' allows younger ages.

The integer|min:18 rule ensures the age is a whole number and at least 18.

3fill in blank

hard

Fix the error in the validation rule to require the 'password' field to be at least 8 characters.

Laravel

'password' => 'required|[1]:8',

Drag options to blanks, or click blank then click option'

Amin

Bmax

Csize

Ddigits

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'max:8' limits password to 8 characters maximum.

Using 'digits' applies only to numeric input.

The min:8 rule ensures the password has at least 8 characters.

4fill in blank

hard

Fill both blanks to validate 'username' is required and unique in the 'users' table.

Laravel

'username' => '[1]|[2]:users',

Drag options to blanks, or click blank then click option'

Arequired

Bemail

Cunique

Dnullable

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'nullable' instead of 'required' allows empty usernames.

Using 'email' instead of 'unique' does not check database uniqueness.

The rules required and unique:users ensure the username is present and not already used.

5fill in blank

hard

Fill all three blanks to validate 'title' is required, a string, and has a maximum length of 255.

Laravel

'title' => '[1]|[2]|[3]:255',

Drag options to blanks, or click blank then click option'

Arequired

Bstring

Cmax

Dmin

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'min' instead of 'max' limits minimum length, not maximum.

Omitting 'string' allows non-text input.

The rules required, string, and max:255 ensure the title is present, text, and not too long.

Practice

1. Which Laravel validation rule ensures a field is not empty and must be present in the input data?

easy

A. required

B. nullable

C. sometimes

D. filled

Solution

1. Step 1: Understand the required rule

   The required rule means the field must be present and not empty in the input data.

2. Step 2: Compare with other rules

   nullable allows empty values, sometimes means the field is optional, and filled means if present, it cannot be empty.

3. Final Answer:

   required -> Option A

4. Quick Check:

   Field must be present and not empty = required [OK]

Hint: Remember: required means must be there and not empty [OK]

Common Mistakes:

• Confusing 'nullable' with 'required'
• Thinking 'sometimes' means required
• Using 'filled' expecting it to require presence

2. Which of the following is the correct syntax to validate that a field named email must be a valid email address in Laravel?

easy

A. 'email' => 'required|email_address'

B. 'email' => 'required|valid_email'

C. 'email' => 'required|mail'

D. 'email' => 'required|email'

Solution

1. Step 1: Identify the correct Laravel email validation rule

   Laravel uses email as the rule to check valid email format.

2. Step 2: Check syntax correctness

   The syntax uses pipe | to separate rules, so 'required|email' is correct.

3. Final Answer:

   'email' => 'required|email' -> Option D

4. Quick Check:

   Email validation rule is 'email' [OK]

Hint: Use 'email' rule for email validation, no extra words [OK]

Common Mistakes:

• Using 'email_address' instead of 'email'
• Using 'mail' or 'valid_email' which are invalid
• Forgetting to separate rules with pipe

3. Given the validation rule 'age' => 'required|integer|min:18', what happens if the input is age = 16?

medium

A. Validation passes because 16 is an integer

B. Validation passes because 'min' only applies to strings

C. Validation fails because 16 is less than the minimum 18

D. Validation fails because 16 is not required

Solution

1. Step 1: Understand the rules applied

   The rules require the field to be present, an integer, and at least 18.

2. Step 2: Check the input value against rules

   Input 16 is an integer and present, but less than 18, so it fails the min:18 rule.

3. Final Answer:

   Validation fails because 16 is less than the minimum 18 -> Option C

4. Quick Check:

   Integer less than min fails validation [OK]

Hint: min applies to numbers too, not just strings [OK]

Common Mistakes:

• Thinking min only applies to string length
• Ignoring the min rule when integer is less
• Assuming integer rule alone is enough

4. What is wrong with this validation rule? 'username' => 'required|min:3|max'

medium

A. The max rule is missing a value

B. The min rule should be min:3,5

C. The required rule cannot be combined with min

D. The pipe separator | is missing

Solution

1. Step 1: Analyze the max rule syntax

   The max rule requires a value like max:10 to specify the maximum length or number.

2. Step 2: Identify the error in the rule string

   Here, max is used without a value, which is invalid syntax.

3. Final Answer:

   The max rule is missing a value -> Option A

4. Quick Check:

   Rules like max need a value after colon [OK]

Hint: Rules like max and min always need a number after colon [OK]

Common Mistakes:

• Omitting the value after max or min
• Using commas inside min rule incorrectly
• Thinking required conflicts with min or max

5. You want to validate a password field that must be at least 8 characters and be confirmed by a matching password_confirmation field. Which validation rule set is correct?

hard

A. 'password' => 'required|string|min:8|regex:/[a-zA-Z]+[0-9]+/|confirmed'

B. 'password' => 'required|string|min:8|confirmed'

C. 'password' => 'required|min:8|alpha_num|confirmed'

D. 'password' => 'required|string|min:8|confirmed|same:password_confirmation'

Solution

1. Step 1: Understand the confirmed rule

   The confirmed rule automatically checks for a matching password_confirmation field.

2. Step 2: Check the rules for password complexity

   required|string|min:8 ensures presence, text type, and minimum length. The confirmed rule handles confirmation.

3. Step 3: Evaluate other options

   alpha_num restricts to letters and numbers but may exclude symbols; regex is complex and not required here; same is redundant with confirmed.

4. Final Answer:

   'password' => 'required|string|min:8|confirmed' -> Option B

5. Quick Check:

   Use confirmed for matching password fields [OK]

Hint: Use 'confirmed' to check matching confirmation field [OK]

Common Mistakes:

• Using 'same' instead of 'confirmed' for confirmation
• Overcomplicating with regex when not needed
• Forgetting to include 'required' or 'min:8'