A field is the representation of a property of an entity.
- General Field Settings
string
Field Typetext
Field Typewysiwyg
Field Typepassword
Field Typeemail
Field Typedate
Field Typedatetime
Field Typenumber
Field Typefloat
Field Typeboolean
Field Typechoice
andchoices
Field Typesjson
Field Typefile
Field Typereference
Field Typereferenced_list
Field Typeembedded_list
Field Typereference_many
Field Type
-
nga.field(name, type)
Create a new field of the given type. Default type is 'string', so you can omit it. Bundled types includestring
,text
,wysiwyg
,password
,email
,date
,datetime
,number
,float
,boolean
,choice
,choices
,json
,file
,reference
,referenced_list
,embedded_list
andreference_many
.The name may use the dot notation to map a nested property. For instance, is the REST endpoint for comments answers as follow:
GET /comments/123 { "id": 123, "author": "Alice", "body": "Lorem ipsum sic dolor amet...", "post": { "title": "Consectetur adipisicing elit", "body": "Sed do eiusmod...", } }
Then you can reference the fields nested under the
post
property by prefixing them with "post.
", as follows:comment.listView().fields([ nga.field('id'), nga.field('author'), nga.field('body'), nga.field('post.title'), // dot notation nga.field('post.body'), // dot notation ])
-
label(string label)
Define the label of the field. Defaults to the uppercased field name. -
editable(boolean)
Define if the field is editable in the edition form. Usefult to display a field without allowing edition (e.g for creation date). -
order(number|null)
Define the position of the field in the view. -
isDetailLink(boolean)
Tell if the value is a link in the list view. Defaults to true for the identifier and references field, false otherwise. The link points to the edition view, except for read-only entities, where it points to the show view. -
detailLinkRoute(string)
Define the route for a link in the list view, i.e.isDetailLink
of the field is true. The default isedit
, hence the link points to the edition view. The other option isshow
to point to the show view. -
map(function)
Define a custom function to transform the value received from the API response to the value displayed in the admin. This function receives 2 parameters: the value to transform, and the corresponding entry. Works in list, edit views and references.nga.field('characters') .map(function truncate(value, entry) { return value + '(' + entry.values.subValue + ')'; });
Multiple
map
can be defined for a field:nga.field('comment') .map(stripTags) .map(truncate);
-
transform(function)
Define a custom function to transform the value displayed in the admin back to the one expected by the API. This function receives 2 parameters: the value to transform, and the corresponding entry. Used in edit view only. Use it in conjunction withmap()
to ease the conversion between the API response format and the format you want displayed on screen.// API // map() v ^ transform() // Entry︎ // // The API provides and expects last names in all caps, e.g. 'DOE' // The admin should display them with capitalized last names, e.g 'Doe' nga.field('last_name') .map(function capitalize(value, entry) { return value.substr(0,1).toUpperCase() + value.substr(1).toLowerCase() }) .transform(function allCaps(value, entry) { // the API expects upper case last names return value.toUpperCase(); });
-
attributes(object)
A list of attributes to be added to the corresponding field.nga.field('title').attributes({ placeholder: 'fill me !' })
-
validation(object)
Set field validation rules. Based on Angular's form validation features.
-
required
: boolean Required boolean fields will render as checkbox for edition -
minlength
: number -
maxlength
: number -
pattern
: regular expression -
validator
: functionnga.field('username') .attributes({ placeholder: 'No space allowed, 5 chars min' }) .validation({ required: true, pattern: '[A-Za-z0-9\.\-_]{5,20}' }), nga.field('website') .validation({ validator: function(value) { if (value.indexOf('http://') !== 0) throw new Error ('Invalid url in website'); } })
-
cssClasses(String|Function)
A list of CSS classes to be added to the corresponding field. If you provide a function, it will receive the current entry as first argument, to allow dynamic classes according to values. The function will also be called without entry for table headers.nga.field('title') .cssClasses(function(entry) { if (entry) { return entry.values.needsAttention ? 'bg-warning' : ''; } return 'my-custom-css-class-for-list-header'; });
-
template(String|Function, templateIncludesLabel=false)
All field types support thetemplate()
method, which makes it easy to customize the look and feel of a particular field, without sacrificing the native features.For instance, if you want to customize the appearance of a
NumberField
according to its value:listview.fields([ nga.field('amount', 'number') .format('$0,000.00') .template('<span ng-class="{ \'red\': value < 0 }"><ma-number-column field="::field" value="::entry.values[field.name()]"></ma-number-column></span>') ]);
The template scope exposes the following variables:
value
,field
,entry
,entity
, anddatastore
inlistView
andshowView
value
,field
,values
, anddatastore
in filtersvalue
,field
,entry
,entity
,form
, anddatastore
ineditionView
andcreationView
In
showView
,editionView
, andcreationView
, the template zone covers only the field itself - not the label. To force the template to replace the entire line (including the label), passtrue
as second argument to thetemplate()
call. This can be very useful to conditionally hide a field according to a property of the entry:post.editionView() .fields([ nga.field('category', 'choice') .choices([ { label: 'Tech', value: 'tech' }, { label: 'Lifestyle', value: 'lifestyle' } ]), nga.field('subcategory', 'choice') .choices(function(entry) { return subCategories.filter(function (c) { return c.category === entry.values.category; }); }) // display subcategory only if there is a category .template('<ma-field ng-if="entry.values.category" field="::field" value="entry.values[field.name()]" entry="entry" entity="::entity" form="formController.form" datastore="::formController.dataStore"></ma-field>', true), ]);
Most of the time,
template()
is used to customize the existing ng-admin directives (like<ma-number-column>
in the previous example), for instance by decorating them. If you want to learn about these native directives, explore the column, field, and fieldView directories in ng-admin source. -
defaultValue(*)
Define the default value of the field in the creation form. -
pinned(boolean)
Whether the field should always appear. Used in filters (see listView Settings). Default to false.
-
stripTags(boolean)
Enable removal of all HTML tags - only the text is kept. Useful for displaying rich text in a table, or before truncation. False by default. -
sanitize(boolean)
Enable HTML sanitization of WYSIWYG Editor value (removal of script tags, etc). True by default.
Only dates represented by a string (e.g "2015-12-08") are handled by the date
field type. For an API returning timestamps, add an element interceptor to convert the value to a string.
format(string ['yyyy-MM-dd' by default])
This method uses the Angular date
filter. Thus, as explained in the Angular documentation, input date should be in a normalized format:
Date to format either as Date object, milliseconds (string or number) or various ISO 8601 datetime string formats (e.g. yyyy-MM-ddTHH:mm:ss.sssZ and its shorter versions like yyyy-MM-ddTHH:mmZ, yyyy-MM-dd or yyyyMMddTHHmmssZ). If no timezone is specified in the string input, the time is considered to be in the local timezone.
parse(function [remove hours, minutes and timezone by default])
Filter applied to modify date object returned by date picker if needed.
Only dates represented by a string (e.g "2015-12-08T23:00:00.000Z") are handled by the datetime
field type. For an API returning timestamps, add an element interceptor to convert the value to a string.
format(string ['yyyy-MM-dd HH:mm:ss' by default])
This method uses the Angular date
filter. Thus, as explained in the Angular documentation, input date should be in a normalized format:
Date to format either as Date object, milliseconds (string or number) or various ISO 8601 datetime string formats (e.g. yyyy-MM-ddTHH:mm:ss.sssZ and its shorter versions like yyyy-MM-ddTHH:mmZ, yyyy-MM-dd or yyyyMMddTHHmmssZ). If no timezone is specified in the string input, the time is considered to be in the local timezone.
parse(function [no change by default])
Filter applied to modify date object returned by date picker if needed.
-
format(string)
Format for number to string conversion. Based on Numeral.js, which uses a syntax similar to Excel. You can configure the locale and create named formats by following angular-numeraljs instructions.nga.field('cost', 'number').format('$0,0.00'); // now 1234.5 will render as '$1,234.50'
A field of type boolean
can have 3 values: true, false, or null. That's why the form widget for such a field is a dropdown and not a checkbox.
-
choices(array)
Array of choices used for the boolean values. By default:[ { value: null, label: 'undefined' }, { value: true, label: 'true' }, { value: false, label: 'false' } ]
Override it with custom labels to fit your needs:
nga.fields('power_user', 'boolean') .choices([ { value: null, label: 'not yet decided' }, { value: true, label: 'enabled' }, { value: false, label: 'disabled' } ]);
-
filterChoices(array)
Array of choices used for the boolean proposed values in a filter. By default:[ { value: true, label: 'true' }, { value: false, label: 'false' } ]
Override it with custom labels to fit your needs:
nga.fields('power_user', 'boolean') .filterChoices([ { value: true, label: 'enabled' }, { value: false, label: 'disabled' } ]);
-
choices(array|function)
Define array of choices forchoice
type.When given an array, each choice must be an object literal with both a value and a label.
nga.field('currency', 'choice') .choices([ { value: 'USD', label: 'dollar ($)' }, { value: 'EUR', label: 'euro (€)' }, ]);
When given a function, the returned choice list must be in the same format (value and label) and can depend on the current entry. This is useful to allow choice fields dependent on each other.
nga.field('country', 'choice') .choices([ { value: 'FR', label: 'France' }, { value: 'US', label: 'USA' }, ]); var cities = [ { country: 'FR', value: 'Paris', label: 'Paris' }, { country: 'FR', value: 'Nancy', label: 'Nancy' }, { country: 'US', value: 'NY', label: 'New York' }, { country: 'US', value: 'SF', label: 'San Francisco' } ] nga.field('city', 'choice') .choices(function(entry) { return cities.filter(function (city) { return city.country === entry.values.country }); });
Tip: When using a function for choice values, if you meet the "Uncaught Error: [$rootScope:infdig] 10 $digest() iterations reached. Aborting!", that's because the
choices()
function returns a new array every time. That's a known AngularJS limitation (see the infinite digest loop documentation).
uploadInformation
Give upload information forfile
field type
url
: url for server side uploadaccept
: values allowed by the standard HTML file input accept attributeapifilename
: filename assigned by the server and returned by your API.
If the uploaded file is renamed server-side, you can get the new filename from an api return.
HTTP/1.1 200 OK
Content-Type: application/json
{ "picture_name": "post_12_picture1.jpg"}
you can configure file field as :
nga.field('picture', 'file').uploadInformation({ 'url': 'your_url', 'apifilename': 'picture_name' })
Some other properties are allowed, see https://github.com/danialfarid/ng-file-upload#upload-service for the complete list.
The reference
type maps a many-to-one relationship where the entity contains a foreign key to another entity. For instance, if the REST API behaves as follows:
GET /comments/123
{
"id": 123,
"body": "Lorem ipsum sic dolor amet...",
"post_id": 456 // foreign key to post of id 456
}
GET /posts/456
{
"id": "456",
"title": "Consectetur adipisicing elit",
"body": "Sed do eiusmod..."
}
Then mapping the post_id
property of the comment
entity to a reference
will tell ng-admin to fetch the related post
entity, and to display the targetField
.
var post = nga.entity('posts');
var comment = nga.entity('comments');
comment.listView().fields([
nga.field('post_id', 'reference')
.targetEntity(post) // Select a target Entity
.targetField(nga.field('title')) // Select the field to be displayed
]);
In a read context (listView
and showView
), reference
fields render the targetField as text. In a write context (creationView
and editionView
), reference
fields render as a dropdown, allowing to select the related entity among a list using the targetField
as a representation. In that case, ng-admin fetches the possible values on the related entity, so a reference
field makes an additional query in a write context:
GET /comments/123 <= get the main entity
{ "id": 123, "post_id": 456, ... },
GET /posts/456 <= get the referenced entity itself
GET /posts?_perPage=30 <= get the possible values for the referenced entity
The reference
type specializes the Field
type, so it supports the same label
, order
, map
, list
& validation
options. Additional options are:
-
targetEntity(Entity)
Define the referenced entity. -
targetField(string)
Define the target field used to retrieve the label of the referenced element.myView.fields([ nga.field('post_id', 'reference') .label('Post content') .targetEntity(post) .targetField(nga.field('body')) // display the body instead of the title .map(truncate) // truncate the long body ]);
-
perPage(integer)
Define the maximum number of related entities fetched and displayed in the dropdown of possible values in a write context. Defaults to 30. -
sortField(String)
Set the field used to sort the list displayed in the dropdown in a write context. Defaults to 'id'. -
sortDir(String)
Set the direction used to sort the list displayed in the dropdown in a write context. Defaults to 'DESC'. -
remoteComplete([true|false], options = {})
In write context, enable autocompletion by fetching remote results as the user types (disabled by default). When enabled, thereference
widget fetches the results matching the string typed in the autocomplete input from the REST API. When set to false, all references (in the limit ofperPage
parameter) are retrieved at view initialization.comments.editionView().fields([ nga.field('id'), nga.field('post_id', 'reference') .targetEntity(post) .targetField(nga.field('title')) .remoteComplete(true) // populate choices from the response of GET /posts?title=XXX ]);
Available options are:
-
refreshDelay
: minimal delay between two API calls in milliseconds. By default: 500. -
searchQuery
: a function returning the parameters to add to the query string based on the input string.comments.editionView().fields([ nga.field('id'), nga.field('post_id', 'reference') .targetEntity(post) .targetField(nga.field('title')) .remoteComplete(true, { refreshDelay: 300, // populate choices from the response of GET /posts?q=XXX searchQuery: function(search) { return { q: search }; } }) .perPage(10) // limit the number of results to 10 ]);
-
-
singleApiCall(function(entityIds) {}
Group queries for the related entities in alistView
. If that option isn't defined, adding areference
field in alistView
triggers a query to the API for the related entity for each row.commentList.fields([ nga.field('post_id', 'reference') .targetEntity(post) .targetField(nga.field('title')) ]); // will trigger the following queries GET /comments?_page=1 [ { "id": 123, "post_id": 456, ... }, { "id": 124, "post_id": 457, ... }, { "id": 125, "post_id": 458, ... }, ] GET /posts/456 { "id": 456, ... } GET /posts/457 { "id": 457, ... } GET /posts/458 { "id": 458, ... }
On most configurations, multiplying the requests to the REST API like that will slow down the rendering of the list a great deal. To speed things up, you can group the calls to the related entities - provided the REST API supports filters for multiple values ("WHERE ... IN"). To do so, use
singleApiCall()
to format the request based on an array of ids.commentList.fields([ nga.field('post_id', 'reference') .targetEntity(post) .targetField(nga.field('title')) .singleApiCall(function (postIds) { return { 'post_id[]': postIds }; }) ]); // will trigger the following queries GET /comments?_page=1 [ { "id": 123, "post_id": 456, ... }, { "id": 124, "post_id": 457, ... }, { "id": 125, "post_id": 458, ... }, ] GET /posts?post_id[]=456&post_id[]=457&post_id[]=458 [ { "id": 456, ... }, { "id": 457, ... }, { "id": 458, ... }, ]
-
permanentFilters({ field1: value, field2: value, ...})
Add filters to the referenced results list. This can be very useful to restrict the list of possible values displayed in a dropdown list. As such, it is only used in write context.comments.editionView().fields([ nga.field('id'), nga.field('post_id', 'reference') .targetEntity(post) .targetField(nga.field('title')) .permanentFilters({ published: true // display only the published posts }); ]); // will trigger the following queries GET /comments/123 <= get the main entity { "id": 123, "post_id": 456, ... } GET /posts/456 <= get the referenced entity itself GET /posts?_filters={"published":true} <= get the possible values for the referenced entity [ { "id": 456, ... }, { "id": 458, ... }, ]
The referenced_list
type maps a one-to-many relationship where the foreign key is located in another entity. For instance, if the REST API behaves as follows:
GET /posts/456
{
"id": "456",
"title": "Consectetur adipisicing elit",
"body": "Sed do eiusmod..."
}
GET /comments/123
{
"id": 123,
"author": "Alice",
"body": "Lorem ipsum sic dolor amet...",
"post_id": 456 // foreign key to post of id 456
}
GET /comments/124
{
"id": 124,
"author": "Bob",
"body": "Lorem ipsum sic dolor amet...",
"post_id": 456 // foreign key to post of id 456
}
Then mapping a comments
property of the post
entity to a referenced_list
will tell ng-admin to fetch the related comment
entities, and to display the result in a datagrid.
var post = nga.entity('posts');
var comment = nga.entity('comments');
post.editionView().fields([
nga.field('comments', 'referenced_list') // Define a 1-N relationship with the comment entity
.targetEntity(comment) // Target the comment Entity
.targetReferenceField('post_id') // Each comment with post_id = post.id (the identifier) will be displayed
.targetFields([ // which comment fields to display in the datagrid
nga.field('id').label('ID'),
nga.field('body').label('Comment')
])
]);
As such, a referenced_list
field is the opposite of a reference
field. referenced_list
fields are not editable (because the relationship is the other entity's responsibility), so they render the same in all contexts: as a datagrid. However, they are only useful in showView
and editionView
(you can't display a datagrid in a datagrid, so this excludes the listView
, and you can't fetch related entities to a non-existent entity, so this excludes the creationView
). For that field, ng-admin fetches the related entities in a single query with a filter:
GET /posts/456 <= get the main entity
GET /comments?_filters={"post_id":456}&_page=1 <= get the values for the referenced entity
The referenced_list
type specializes the Field
type, so it supports the same label
, order
, map
, list
& validation
options. Additional options are:
-
targetEntity(Entity)
Define the referenced entity. -
targetReferenceField(string)
Define the field name used to link the referenced entity. -
targetFields(Array(Field))
Define the list of fields of the target entity to be displayed in the datagrid.myEditionView.fields([ nga.field('comments', 'referenced_list') .targetEntity(comment) .targetReferenceField('post_id') .targetFields([ // choose another set of fields nga.field('author'), nga.field('body') ]) ]);
-
perPage(integer)
Define the maximum number of related entities fetched and displayed in the datagrid. Defaults to 30. -
sortField(String)
Set the field used to sort the datagrid. Defaults to 'id'. -
sortDir(String)
Set the direction used to sort the datagrid. Defaults to 'DESC'. -
permanentFilters({ field1: value, field2: value, ...})
Filter the list of referenced entities list. This can be very useful to restrict the list of possible values displayed in the datagrid:post.editionView().fields([ nga.field('comments', 'referenced_list') .targetEntity(comment) .targetReferenceField('post_id') .targetFields([ nga.field('id').label('ID'), nga.field('body').label('Comment') ]) .permanentFilters({ published: true // display only the published comments }) ]); // will trigger the following queries GET /post/456 <= get the main entity { "id": 456, ... } GET /posts?_filters={"post_id":456,"published":true}&_page=1 <= get the possible values for the referenced entity [ { "id": 123, "post_id": 456, ... }, { "id": 124, "post_id": 456, ... }, ]
The embedded_list
type maps a one-to-many relationship where the related entities are embedded in the main response. For instance, if the REST API behaves as follows:
GET /posts/1
{
"id": "1",
"title": "Consectetur adipisicing elit",
"body": "Sed do eiusmod...",
"comments": [
{
"author": "Alice",
"body": "Lorem ipsum sic dolor amet...",
},
{
"author": "Bob",
"body": "Lorem ipsum sic dolor amet...",
}
]
}
Then mapping a comments
property of the post
entity to an embedded_list
will tell ng-admin to use the embedded comment
entities.
post.showView().fields([
nga.field('comments', 'embedded_list') // Define a 1-N relationship with the (embedded) comment entity
.targetFields([ // which comment fields to display in the datagrid / form
nga.field('body')
])
]);
Ng-admin rendersembedded_list
fields as a datagrid in read context (showView
), and as a list of embedded forms in write context (creationView
and editionView
). This won't issue any additional query to the REST API, since the related entities are already embedded.
The embedded_list
type specializes the Field
type, so it supports the same label
, order
, map
, list
& validation
options. Additional options are:
-
targetFields(Array(Field))
Define the list of fields of the target entity to be displayed in the datagrid.myEditionView.fields([ nga.field('comments', 'embedded_list') .targetFields([ // choose another set of fields nga.field('author'), nga.field('body') ]) ]);
-
sortField(String)
Set the field used to sort the datagrid. Defaults to 'id'. -
sortDir(String)
Set the direction used to sort the datagrid. Defaults to 'DESC'. -
targetEntity(Entity)
Define the referenced entity (optional). When set, if the embedded entities have an identifier field, theembedded_list
datagrid will be able to display links to the detail view of the entity. It is not used in write context.var post = nga.entity('posts'); var comment = nga.entity('comments'); post.showView().fields([ nga.field('comments', 'embedded_list') // Define a 1-N relationship with the (embedded) comment entity .targetEntity(comment) .targetFields([ // which comment fields to display in the datagrid / form nga.field('id') // will have a link to comment edition view nga.field('body') ]) ]);
-
permanentFilters({ field1: value, field2: value, ...})
Filter the list of referenced entities list. This can be very useful to restrict the list of possible values displayed in the datagrid:post.editionView().fields([ nga.field('comments', 'embedded_list') .targetFields([ nga.field('body') ]) .permanentFilters({ published: true // display only the published comments }) ]);
The reference_many
type maps a one-to-many relationship where the identifiers of the related entities are embedded in the main response. For instance, if the REST API behaves as follows:
GET /posts/456
{
"id": "456",
"title": "Consectetur adipisicing elit",
"body": "Sed do eiusmod...",
"comments": [123, 124]
}
GET /comments/123
{
"id": 123,
"author": "Alice",
"body": "Lorem ipsum sic dolor amet...",
}
GET /comments/124
{
"id": 124,
"author": "Bob",
"body": "Lorem ipsum sic dolor amet...",
}
Then mapping a comments
property of the post
entity to a reference_many
will tell ng-admin to fetch the related comment
entities.
var post = nga.entity('posts');
var comment = nga.entity('comments');
post.editionView().fields([
nga.field('comments', 'reference_many') // Define a 1-N relationship with the comment entity
.targetEntity(comment) // Target the comment Entity
.targetField(nga.field('body')) // the field of the comment entity to use as representation
]);
reference_many
fields render as a list of labels in read context (listView
and showView
), and as a select multiple in write context (creationView
and editionView
). For that field, ng-admin fetches the related entities one by one:
GET /posts/456 <= get the main entity
{ "id": "456", "comments": [123, 124], ... }
GET /comments/123
GET /comments/124
The reference_many
field type also defines label
, order
, map
& validation
options like the Field
type.
-
targetEntity(Entity)
Define the referenced entity. -
targetField(Field)
Define the field name used to link the referenced entity.myView.fields([ nga.field('tags', 'reference_many') .label('Tags') .isDetailLink(false) .targetEntity(tag) // Targeted entity .targetField(nga.field('name')) // Label Field to display in the list ])
-
singleApiCall(function(entityIds) {}
Define a function that returns parameters for filtering API calls. You can use it if you API supports filter for multiple values.// Will call /tags?tag_id[]=1&tag_id[]=2&tag_id%[]=5... postList.fields([ nga.field('tags', 'reference_many') .singleApiCall(function (tagIds) { return { 'tag_id[]': tagIds }; }) ]);
Tip: It also works for
creationView
andeditionView
-
permanentFilters({ field1: value, field2: value, ...})
Add filters to the referenced results list. -
remoteComplete([true|false], options = {})
Enable autocompletion by fetching remote results (disabled by default). When enabled, thereference
widget fetches the results matching the string typed in the autocomplete input from the REST API. If set to false, all references (in the limit ofperPage
parameter) would be retrieved at view initialization.post.editionView().fields([ nga.field('id'), nga.field('tags', 'reference_many') .targetEntity(tag) .targetField(nga.field('name')) .remoteComplete(true) // populate choices from the response of GET /tags?name=XXX ]);
Available options are:
-
refreshDelay
: minimal delay between two API calls in milliseconds. By default: 500. -
searchQuery
: a function returning the parameters to add to the query string basd on the input string.post.editionView().fields([ nga.field('id'), nga.field('tags', 'reference_many') .targetEntity(tag) .targetField(nga.field('name')) .remoteComplete(true, { refreshDelay: 300, // populate choices from the response of GET /tags?q=XXX searchQuery: function(search) { return { q: search }; } }) .perPage(10) // limit the number of results to 10 ]);
-