Flutter Map a custom JSON to Object - json

Question

I want to get an image URL from WP REST API, I was retrieving my posts to a List
so getting featuredImageUrl was like this :
A)
//THIS GETS AN URL TO ATTACHMENT WHEN IM USING A LIST<DYNAMIC>
featuredMediaAtta = posts[index]["_embedded"]["wp:featuredmedia"][0]["source_url"],
result is a url of embedded attachment, I want the same results in B
B)
I had to changed to Object Model from list to List>
The post model is:
Post.fromMap(Map<String, dynamic> map) {
if (map == null) {
return;
}
...
//I can retrieve featured media id successfully
featuredMediaID = map['featured_media'];
// BUT HERE I CAN NOT RETURN THE ATTACHMENT URL
featuredMediaAtta = map["_embedded"]["wp:featuredmedia"][0]["source_url"] ;
commentStatus = map['comment_status'];
...
here is the JSON response for getting
http://www.ehawal.com/wp-json/wp/v2/posts/73335?_embed
{
"id": 73335,
"date": "2018-12-01T20:05:26",
"date_gmt": "2018-12-01T20:05:26",
"guid": {
"rendered": "http://www.theUrl.com/?p=73335"
},
"modified": "2018-12-01T20:05:26",
"modified_gmt": "2018-12-01T20:05:26",
"slug": "%d8%a8%d9%88-%d9%88%db%8e%d9%86%d9%87%e2%80%8c%db%8c-%d9%86%d9%88%db%8e",
"status": "publish",
"type": "post",
"link": "http://www.theUrl.com/2018/12/01/%d8%a8%d9%88-%d9%88%db%8e%d9%86%d9%87%e2%80%8c%db%8c-%d9%86%d9%88%db%8e/",
"title": {
"rendered": "بو وێنه\u200cی نوێ"
},
"content": {
"rendered": "<p>وێمه\u200cی لكسادژڤ ؛لكژ اعس</p>\n<div class=\"theUrl_container\"
"protected": false
},
"excerpt": {
"rendered": "<p>وێمه\u200cی لكسادژڤ ؛لكژ اعس</p>\n<div class=\"theUrl_container\" style=\"\"><!-- theUrl.com BEGIN --><span class=\"theUrl-wrapper\"
"author": 1,
"featured_media": 73336,
"comment_status": "open",
"ping_status": "open",
"sticky": false,
"template": "",
"format": "standard",
"meta": [],
"categories": [
195,
1,
176
],
"tags": [],
"acf": [],
"_links": {
"self": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/posts/73335"
}
],
"collection": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/posts"
}
],
"about": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/types/post"
}
],
"author": [
{
"embeddable": true,
"href": "http://www.theUrl.com/wp-json/wp/v2/users/1"
}
],
"replies": [
{
"embeddable": true,
"href": "http://www.theUrl.com/wp-json/wp/v2/comments?post=73335"
}
],
"version-history": [
{
"count": 1,
"href": "http://www.theUrl.com/wp-json/wp/v2/posts/73335/revisions"
}
],
"predecessor-version": [
{
"id": 73337,
"href": "http://www.theUrl.com/wp-json/wp/v2/posts/73335/revisions/73337"
}
],
"wp:featuredmedia": [
{
"embeddable": true,
"href": "http://www.theUrl.com/wp-json/wp/v2/media/73336"
}
],
"wp:attachment": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/media?parent=73335"
}
],
"wp:term": [
{
"taxonomy": "category",
"embeddable": true,
"href": "http://www.theUrl.com/wp-json/wp/v2/categories?post=73335"
},
{
"taxonomy": "post_tag",
"embeddable": true,
"href": "http://www.theUrl.com/wp-json/wp/v2/tags?post=73335"
}
],
"curies": [
{
"name": "wp",
"href": "https://api.w.org/{rel}",
"templated": true
}
]
},
"_embedded": {
"author": [
{
"id": 1,
"name": "hooshyar_nuc",
"url": "",
"description": "",
"link": "http://www.theUrl.com/author/hooshyar_nuc/",
"slug": "hooshyar_nuc",
"avatar_urls": {
"24": "http://0.gravatar.com/avatar/f1a624f625d4271d52b7fc9445609eb5?s=24&d=mm&r=g",
"48": "http://0.gravatar.com/avatar/f1a624f625d4271d52b7fc9445609eb5?s=48&d=mm&r=g",
"96": "http://0.gravatar.com/avatar/f1a624f625d4271d52b7fc9445609eb5?s=96&d=mm&r=g"
},
"acf": [],
"_links": {
"self": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/users/1"
}
],
"collection": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/users"
}
]
}
}
],
"wp:featuredmedia": [
{
"id": 73336,
"date": "2018-12-01T20:05:10",
"slug": "guardian",
"type": "attachment",
"link": "http://www.theUrl.com/2018/12/01/%d8%a8%d9%88-%d9%88%db%8e%d9%86%d9%87%e2%80%8c%db%8c-%d9%86%d9%88%db%8e/guardian/",
"title": {
"rendered": "guardian"
},
"author": 1,
"acf": [],
"caption": {
"rendered": ""
},
"alt_text": "",
"media_type": "image",
"mime_type": "image/png",
"media_details": {
"width": 400,
"height": 155,
"file": "2018/12/guardian.png",
"sizes": {
"thumbnail": {
"file": "guardian-150x150.png",
"width": 150,
"height": 150,
"mime_type": "image/png",
"source_url": "http://www.theUrl.com/wp-content/uploads/2018/12/guardian-150x150.png"
},
"medium": {
"file": "guardian-300x116.png",
"width": 300,
"height": 116,
"mime_type": "image/png",
"source_url": "http://www.theUrl.com/wp-content/uploads/2018/12/guardian-300x116.png"
},
"tie-small": {
"file": "guardian-110x75.png",
"width": 110,
"height": 75,
"mime_type": "image/png",
"source_url": "http://www.theUrl.com/wp-content/uploads/2018/12/guardian-110x75.png"
},
"tie-medium": {
"file": "guardian-310x155.png",
"width": 310,
"height": 155,
"mime_type": "image/png",
"source_url": "http://www.theUrl.com/wp-content/uploads/2018/12/guardian-310x155.png"
},
"tie-large": {
"file": "guardian-310x155.png",
"width": 310,
"height": 155,
"mime_type": "image/png",
"source_url": "http://www.theUrl.com/wp-content/uploads/2018/12/guardian-310x155.png"
},
"full": {
"file": "guardian.png",
"width": 400,
"height": 155,
"mime_type": "image/png",
"source_url": "http://www.theUrl.com/wp-content/uploads/2018/12/guardian.png"
}
},
"image_meta": {
"aperture": "0",
"credit": "",
"camera": "",
"caption": "",
"created_timestamp": "0",
"copyright": "",
"focal_length": "0",
"iso": "0",
"shutter_speed": "0",
"title": "",
"orientation": "0",
"keywords": []
}
},
"source_url": "http://www.theUrl.com/wp-content/uploads/2018/12/guardian.png",
"_links": {
"self": [
{
"attributes": [],
"href": "http://www.theUrl.com/wp-json/wp/v2/media/73336"
}
],
"collection": [
{
"attributes": [],
"href": "http://www.theUrl.com/wp-json/wp/v2/media"
}
],
"about": [
{
"attributes": [],
"href": "http://www.theUrl.com/wp-json/wp/v2/types/attachment"
}
],
"author": [
{
"attributes": {
"embeddable": true
},
"href": "http://www.theUrl.com/wp-json/wp/v2/users/1"
}
],
"replies": [
{
"attributes": {
"embeddable": true
},
"href": "http://www.theUrl.com/wp-json/wp/v2/comments?post=73336"
}
]
}
}
],
"wp:term": [
[
{
"id": 195,
"link": "http://www.theUrl.com/category/world/",
"name": "جیهان",
"slug": "world",
"taxonomy": "category",
"acf": [],
"_links": {
"self": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/categories/195"
}
],
"collection": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/categories"
}
],
"about": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/taxonomies/category"
}
],
"wp:post_type": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/posts?categories=195"
}
],
"curies": [
{
"name": "wp",
"href": "https://api.w.org/{rel}",
"templated": true
}
]
}
},
{
"id": 1,
"link": "http://www.theUrl.com/category/all/",
"name": "سه\u200cره\u200cكی",
"slug": "all",
"taxonomy": "category",
"acf": [],
"_links": {
"self": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/categories/1"
}
],
"collection": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/categories"
}
],
"about": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/taxonomies/category"
}
],
"wp:post_type": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/posts?categories=1"
}
],
"curies": [
{
"name": "wp",
"href": "https://api.w.org/{rel}",
"templated": true
}
]
}
},
{
"id": 176,
"link": "http://www.theUrl.com/category/grng/",
"name": "گرنگ",
"slug": "grng",
"taxonomy": "category",
"acf": [],
"_links": {
"self": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/categories/176"
}
],
"collection": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/categories"
}
],
"about": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/taxonomies/category"
}
],
"wp:post_type": [
{
"href": "http://www.theUrl.com/wp-json/wp/v2/posts?categories=176"
}
],
"curies": [
{
"name": "wp",
"href": "https://api.w.org/{rel}",
"templated": true
}
]
}
}
],
[]
]
}
}