Input Validation is one of the most important things while inserting or updating existing data. GraphQL allows the Schema Directives to validate the Input Arguments. GraphQL Java team manages an extended validation library that provides basic validation Directives. The Latest version of the extended validation library can be downloaded from here.
| Directive | Description |
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The AssertFalse Validation Directive is applied to the boolean and checks if it's not false. |
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The AssertTrue Validation Directive is applied to the boolean and checks if it's not false. |
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The ContainerNotEmpty Validation Directive is applied to the Lists and Input Objects and checks if it's not null. |
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The ContainerSize Validation Directive is applied to the Lists, Input Objects and checks if its size is between the specified min and max boundaries. |
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The DecimalMax Validation Directive is applied to the Float and checks if its value should be less or equal to the specified minimum. |
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The DecimalMinValidation Directive is applied to the Float and checks if it's more than the specified value. |
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The Digits Validation Directive is applied to the Float and checks if it's digits before decimal and digits after decimal should be within the specified value. |
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The Expression Validation Directive is provides an Expression must result to true. |
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The Max Validation Directive is applied to the Number and checks if it's less than the specified. |
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The Min Validation Directive is applied to the Number and checks if it's less than specified. |
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The Negative Validation Directive is applied to the Numbers and checks if it's not negative. |
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The NegativeOrZero Validation Directive is applied to the Numbers and checks it should be negative or equal to 0. |
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The NotBlank Validation Directive is applied to the String and checks if it's not blank, it validates according to Java's Character.isWhitespace(). |
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The NotEmpty Validation Directive is applied to the String and checks if it's not empty. |
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The Pattern Validation Directive is applied to the String, ID, Lists and checks The String must match the specified regular expression, it follows the Java regular expression conventions. |
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The Positive Validation Directive is applied to the Numbers and checks if it's not positive. |
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The PositiveOrZero Validation Directive is applied to the Numbers and checks it should be positive or equal to 0. |
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The Negative Validation Directive is applied to the Numbers and checks if it's not negative. |
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| Size | The Size Validation Directive is applied to the String, ID, Lists and checks if its size must be between the specified min and max boundaries. |
