The `'enctype' => 'multipart/form-data'` is important since it allows file uploads. `fileInput()` represents a form
The `'enctype' => 'multipart/form-data'` is necessary because it allows file uploads. `fileInput()` represents a form
input field.
Controller
...
...
@@ -96,10 +96,8 @@ class SiteController extends Controller
}
```
Instead of `model->load(...)` we are using `UploadedFile::getInstance(...)`. [[\yii\web\UploadedFile|UploadedFile]]
does not run the model validation. It only provides information about the uploaded file. Therefore, you need to run
validation manually via `$model->validate()`. This triggers the [[yii\validators\FileValidator|FileValidator]] that
expects a file:
Instead of `model->load(...)`, we are using `UploadedFile::getInstance(...)`. [[\yii\web\UploadedFile|UploadedFile]]
does not run the model validation, rather it only provides information about the uploaded file. Therefore, you need to run the validation manually via `$model->validate()` to trigger the [[yii\validators\FileValidator|FileValidator]] that expects a file:
```php
$fileinstanceofUploadedFile||$file->error==UPLOAD_ERR_NO_FILE//in the code framework
...
...
@@ -144,7 +142,7 @@ public function rules()
}
```
Keep in mind that only the file extension will be validated, but not the actual file content. In order to validate content as well use the `mimeTypes` property of `FileValidator`:
Keep in mind that only the file extension will be validated, but not the actual file content. In order to validate the content as well, use the `mimeTypes` property of `FileValidator`:
```php
publicfunctionrules()
...
...
@@ -164,7 +162,9 @@ received a valid image that can be then either saved or processed using the [Ima
### Uploading multiple files
If you need to download multiple files at once some adjustments are required. View:
If you need to download multiple files at once, some adjustments are required.
View:
```php
<?php
...
...
@@ -241,5 +241,5 @@ class SiteController extends Controller
}
```
The difference is `UploadedFile::getInstances($model, 'file');` instead of `UploadedFile::getInstance($model, 'file');`.
The difference is using `UploadedFile::getInstances($model, 'file');` instead of `UploadedFile::getInstance($model, 'file');`.
The former returns instances for **all** uploaded files while the latter gives you only a single instance.
Data grid or GridView is one of the most powerful Yii widgets. It is extremely useful if you need to quickly build admin
Data grid or GridView is one of the most powerful Yii widgets. It is extremely useful if you need to quickly build the admin
section of the system. It takes data from [data provider](output-data-providers.md) and renders each row using a set of columns
presenting data in a form of a table.
presenting data in the form of a table.
Each row of the table represents the data of a single data item, and a column usually represents an attribute of
the item (some columns may correspond to complex expressions of attributes or static text).
Grid view supports both sorting and pagination of the data items. The sorting and pagination can be done in AJAX mode
or normal page request. A benefit of using GridView is that when the user disables JavaScript, the sorting and pagination
automatically degrade to normal page requests and are still functioning as expected.
or as a normal page request. A benefit of using GridView is that when the user disables JavaScript, the sorting and pagination automatically degrade to normal page requests and still function as expected.
The minimal code needed to use GridView is as follows:
...
...
@@ -74,7 +73,7 @@ the data provider. The displayed table is equipped with sorting and pagination f
Yii grid consists of a number of columns. Depending on column type and settings these are able to present data differently.
These are defined in the columns part of GridView config like the following:
These are defined in the columns part of GridView configuration like the following:
```php
echoGridView::widget([
...
...
@@ -82,7 +81,7 @@ echo GridView::widget([
'columns'=>[
['class'=>'yii\grid\SerialColumn'],
// A simple column defined by the data contained in $dataProvider.
// Data from model's column1 will be used.
// Data from the model's column1 will be used.
'id',
'username',
// More complex one.
...
...
@@ -96,7 +95,7 @@ echo GridView::widget([
]);
```
Note that if columns part of config isn't specified, Yii tries to show all possible data provider model columns.
Note that if the columns part of the configuration isn't specified, Yii tries to show all possible data provider model columns.
### Column classes
...
...
@@ -112,7 +111,7 @@ echo GridView::widget([
],
```
Additionally to column classes provided by Yii that we'll review below you can create your own column classes.
In addition to column classes provided by Yii that we'll review below you can create your own column classes.
Each column class extends from [[\yii\grid\Column]] so there are some common options you can set while configuring
grid columns.
...
...
@@ -131,17 +130,17 @@ grid columns.
You may specify various container HTML options by passing arrays to:
- `headerOptions`
- `contentOptions`
- `footerOptions`
- `filterOptions`
- `contentOptions`
#### Data column <a name="data-column"></a>
Data column is used for displaying and sorting data. It is default column type so specifying class could be omitted when
Data column is used for displaying and sorting data. It is the default column type so the specifying class could be omitted when
using it.
The main setting of the data column is its format. It could be specified via `format` attribute. Its values are
corresponding to methods in `formatter`[applicationcomponent](structure-application-components.md)thatis[[\yii\i18n\Formatter|Formatter]]bydefault:
The main setting of the data column is its format. It could be specified via `format` attribute. Its values
correspond to methods in the `formatter`[applicationcomponent](structure-application-components.md)thatis[[\yii\i18n\Formatter|Formatter]]bydefault:
```php
echo GridView::widget([
...
...
@@ -158,8 +157,8 @@ echo GridView::widget([
]);
```
In the above `text` corresponds to [[\yii\i18n\Formatter::asText()]]. The value of the column is passed as the first
argument. In the second column definition `date` corresponds to [[\yii\i18n\Formatter::asDate()]]. The value of the
In the above, `text` corresponds to [[\yii\i18n\Formatter::asText()]]. The value of the column is passed as the first
argument. In the second column definition, `date` corresponds to [[\yii\i18n\Formatter::asDate()]]. The value of the
column is, again, passed as the first argument while 'Y-m-d' is used as the second argument value.
For a list of available formatters see the [section about Data Formatting](output-formatter.md).
...
...
@@ -187,7 +186,7 @@ Available properties you can configure are:
treated as controller action IDs (also called *button names* in the context of action column). They will be replaced
by the corresponding button rendering callbacks specified in [[yii\grid\ActionColumn::$buttons|buttons]]. For example, the token `{view}` will be
replaced by the result of the callback `buttons['view']`. If a callback cannot be found, the token will be replaced
with an empty string. Default is `{view} {update} {delete}`.
with an empty string. The default tokens are `{view} {update} {delete}`.
- `buttons` is an array of button rendering callbacks. The array keys are the button names (without curly brackets),
and the values are the corresponding button rendering callbacks. The callbacks should use the following signature:
...
...
@@ -197,7 +196,7 @@ function ($url, $model, $key) {
}
```
In the code above `$url` is the URL that the column creates for the button, `$model` is the model object being
In the code above, `$url` is the URL that the column creates for the button, `$model` is the model object being
rendered for the current row, and `$key` is the key of the model in the data provider array.
- `urlCreator` is a callback that creates a button URL using the specified model information. The signature of
...
...
@@ -257,7 +256,7 @@ A common practice when using [active records](db-active-record.md) is to create
that provides needed functionality (it can be generated for you by Gii). This class defines the validation
rules for the search and provides a `search()` method that will return the data provider.
To add search capability for the `Post` model we can create `PostSearch` like in the following example:
To add the search capability for the `Post` model, we can create `PostSearch` like in the following example:
```php
<?php
...
...
@@ -385,12 +384,12 @@ In `search()` you then just add another filter condition with:
#### Using sql views for filtering, sorting and displaying data
There is also other approach that can be faster and more useful - sql views. So for example if we need to show gridview
with users and their profiles we can do it in this way:
There is also another approach that can be faster and more useful - sql views. For example, if we need to show the gridview
with users and their profiles, we can do so in this way:
```php
CREATE OR REPLACE VIEW vw_user_info AS
...
...
@@ -434,7 +433,7 @@ CREATE OR REPLACE VIEW vw_user_info AS
WHERE user.id = user_profile.user_id
```
Then you need to create ActiveRecord that will be representing this view:
Then you need to create the ActiveRecord that will be representing this view:
```php
...
...
@@ -482,26 +481,26 @@ class UserView extends ActiveRecord
}
```
After that you can use this UserView active record with search models, without additional specifying of sorting and filtering attributes.
After that you can use this UserView active record with search models, without additional specification of sorting and filtering attributes.
All attributes will be working out of the box. Note that this approach has several pros and cons:
- you don't need to specify different sorting and filtering conditions and other things. Everything works out of the box;
- it can be much faster because of the data size, count of sql queries performed (for each relation you will need additional query);
- since this is just a simple mapping UI on sql view it lacks some domain logic that is in your entities, so if you have some methods like `isActive`,
`isDeleted` or other that will influence on UI, you will need to duplicate them in this class too.
- you don't need to specify different sorting and filtering conditions. Everything works out of the box;
- it can be much faster because of the data size, count of sql queries performed (for each relation you will need an additional query);
- since this is just a simple mapping UI on the sql view it lacks some domain logic that is in your entities, so if you have some methods like `isActive`,
`isDeleted` or others that will influence the UI, you will need to duplicate them in this class too.
### Multiple GridViews on one page
You can use more than one GridView on a single page but some additional configuration is needed so that
they do not interfere.
they do not interfere with each other.
When using multiple instances of GridView you have to configure different parameter names for
the generated sort and pagination links so that each GridView has its individual sorting and pagination.
the generated sort and pagination links so that each GridView has its own individual sorting and pagination.
You do so by setting the [[yii\data\Sort::sortParam|sortParam]] and [[yii\data\Pagination::pageParam|pageParam]]
of the dataProvider's [[yii\data\BaseDataProvider::$sort|sort]] and [[yii\data\BaseDataProvider::$pagination|pagination]]
instances.
Assume we want to list `Post` and `User` models for which we have already prepared two data providers
Assume we want to list the `Post` and `User` models for which we have already prepared two data providers
@@ -83,4 +83,4 @@ public function beforeSave($insert)
}
```
The `validateAuthKey` method just needs to compare the `$authKey` variable, passed as parameter (itself retrieved from a cookie), with the value fetched from database.
The `validateAuthKey` method just needs to compare the `$authKey` variable, passed as a parameter (itself retrieved from a cookie), with the value fetched from the database.
