currency

type: string default: EUR

Specifies the currency that the money is being specified in. This determines the currency symbol that should be shown by the text box. Depending on the currency - the currency symbol may be shown before or after the input text field.

This can be any 3 letter ISO 4217 code. You can also set this to false to hide the currency symbol.

divisor

type: integer default: 1

If, for some reason, you need to divide your starting value by a number before rendering it to the user, you can use the divisor option. For example:

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$builder->add('price', 'money', array(
    'divisor' => 100,
));

In this case, if the price field is set to 9900, then the value 99 will actually be rendered to the user. When the user submits the value 99, it will be multiplied by 100 and 9900 will ultimately be set back on your object.

precision

type: integer default: 2

For some reason, if you need some precision other than 2 decimal places, you can modify this value. You probably won't need to do this unless, for example, you want to round to the nearest dollar (set the precision to 0).

grouping

type: integer default: false

This value is used internally as the NumberFormatter::GROUPING_USED value when using PHP's NumberFormatter class. Its documentation is non-existent, but it appears that if you set this to true, numbers will be grouped with a comma or period (depending on your locale): 12345.123 would display as 12,345.123.

required

type: Boolean default: true

If true, an HTML5 required attribute will be rendered. The corresponding label will also render with a required class.

This is superficial and independent from validation. At best, if you let Symfony guess your field type, then the value of this option will be guessed from your validation information.

label

type: string default: The label is "guessed" from the field name

Sets the label that will be used when rendering the field. The label can also be directly set inside the template:

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{{ form_label(form.name, 'Your name') }}

read_only

type: Boolean default: false

If this option is true, the field will be rendered with the disabled attribute so that the field is not editable.

error_bubbling

type: Boolean default: false

If true, any errors for this field will be passed to the parent field or form. For example, if set to true on a normal field, any errors for that field will be attached to the main form, not to the specific field.

invalid_message

type: string default: This value is not valid

This is the validation error message that's used if the data entered into this field doesn't make sense (i.e. fails validation).

This might happen, for example, if the user enters a nonsense string into a time field that cannot be converted into a real time or if the user enters a string (e.g. apple) into a number field.

Normal (business logic) validation (such as when setting a minimum length for a field) should be set using validation messages with your validation rules (reference).

invalid_message_parameters

type: array default: array()

When setting the invalid_message option, you may need to include some variables in the string. This can be done by adding placeholders to that option and including the variables in this option:

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$builder->add('some_field', 'some_type', array(
    // ...
    'invalid_message'            => 'You entered an invalid value - it should include %num% letters',
    'invalid_message_parameters' => array('%num%' => 6),
));