What is the RootElement of this Content - delphi

Question

I'm trying to use the TRESTResponseDataSetAdapter.
Every combination that I've tried for the JSON RootElement property fails
You can view the content by running this in your browser:
https://api.hubapi.com/contacts/v1/lists/all/contacts/all?hapikey=Demo&count=1000
{
"contacts":[
{
"addedAt":1405347851360,
"vid":154835,
"canonical-vid":154835,
"merged-vids":[
],
"portal-id":62515,
"is-contact":true,
"profile-token":"AO_T-mMn77ArlMSBCTdpOp0rf0qYYooZ7bHB6ehvufx9uNoV0Pyuiq1wq-A83BQmzFVFVC45T8S6tXhkq_7fcDi5Wzne7VXydwTvrKIViisZNBjWhUjJ8OiXhXW0owESlE2QCh2_rZsy",
"profile-url":"https://app.hubspot.com/contacts/62515/lists/public/contact/_AO_T-mMn77ArlMSBCTdpOp0rf0qYYooZ7bHB6ehvufx9uNoV0Pyuiq1wq-A83BQmzFVFVC45T8S6tXhkq_7fcDi5Wzne7VXydwTvrKIViisZNBjWhUjJ8OiXhXW0owESlE2QCh2_rZsy/",
"properties":{
"firstname":{
"value":"HubSpot"
},
"lastmodifieddate":{
"value":"1429569233340"
},
"lastname":{
"value":"Test"
}
},
"form-submissions":[
{
"conversion-id":"b18f9fd8-b8d3-49e5-898a-ac301fac93e9",
"timestamp":1405347851180,
"form-id":"b844ad5e-32bd-41e1-b0e6-ed990c5f3d1b",
"portal-id":62515,
"page-url":"http://demo.hubapi.com/your-stunning-headline-30",
"page-title":"Your stunning headline!",
"page-id":"324527",
"title":"My New Form",
"meta-data":[
]
}
],
"identity-profiles":[
{
"vid":154835,
"saved-at-timestamp":1405347851237,
"deleted-changed-timestamp":0,
"identities":[
{
"type":"EMAIL",
"value":"test#hubspot.com",
"timestamp":1405347851180
},
{
"type":"LEAD_GUID",
"value":"c8f20860-d3d6-4b57-b092-86a07cebdcbc",
"timestamp":1405347851237
}
]
}
],
"merge-audits":[
]
},
{
"addedAt":1390569372731,
"vid":196181,
"canonical-vid":196181,
"merged-vids":[
],
"portal-id":62515,
"is-contact":true,
"profile-token":"AO_T-mNWKZQBRv0UiQpPnG-WPBgVlfYwFgdTyJW3sU9frlA4esRYMOtMpo4OQMh736HGvJpuDLAuJexFXkyrIPu7eK-hxFYwGoqefbbP1cQeh6B0mRPE-iU1dhYRhRJsWyroaToFvFuo",
"profile-url":"https://app.hubspot.com/contacts/62515/lists/public/contact/_AO_T-mNWKZQBRv0UiQpPnG-WPBgVlfYwFgdTyJW3sU9frlA4esRYMOtMpo4OQMh736HGvJpuDLAuJexFXkyrIPu7eK-hxFYwGoqefbbP1cQeh6B0mRPE-iU1dhYRhRJsWyroaToFvFuo/",
"properties":{
"firstname":{
"value":"Charles"
},
"lastmodifieddate":{
"value":"1429569231725"
},
"company":{
"value":""
},
"lastname":{
"value":"Gowland"
}
},
"form-submissions":[
],
"identity-profiles":[
{
"vid":196181,
"saved-at-timestamp":1390569372649,
"deleted-changed-timestamp":0,
"identities":[
{
"type":"EMAIL",
"value":"clg#gburnette.com",
"timestamp":1390568711002
},
{
"type":"LEAD_GUID",
"value":"dca0d8a2-fa9c-4ca6-b5ef-c1bfb4a0bed4",
"timestamp":1390569372636
}
]
}
],
"merge-audits":[
]
},
{
"addedAt":1390569372834,
"vid":196182,
"canonical-vid":196182,
"merged-vids":[
],
"portal-id":62515,
"is-contact":true,
"profile-token":"AO_T-mPTJ_EIS2780cJONDGKv5bmchukJnQ37QmmSc-lPJacEyzXo8piybhaAhQzT0HBXxq0QYXFU_4wN5ewYsclTt8WE3KAxx6neusNNYGr8aEiy-s6izAG-CCehTdomM5Pai4YOKue",
"profile-url":"https://app.hubspot.com/contacts/62515/lists/public/contact/_AO_T-mPTJ_EIS2780cJONDGKv5bmchukJnQ37QmmSc-lPJacEyzXo8piybhaAhQzT0HBXxq0QYXFU_4wN5ewYsclTt8WE3KAxx6neusNNYGr8aEiy-s6izAG-CCehTdomM5Pai4YOKue/",
"properties":{
"firstname":{
"value":"Curtis"
},
"lastmodifieddate":{
"value":"1429569238098"
},
"company":{
"value":""
},
"lastname":{
"value":"Romig"
}
},
"form-submissions":[
],
"identity-profiles":[
{
"vid":196182,
"saved-at-timestamp":1390569372699,
"deleted-changed-timestamp":0,
"identities":[
{
"type":"EMAIL",
"value":"curtis.romig#bryancave.com",
"timestamp":1390568725415
},
{
"type":"LEAD_GUID",
"value":"e18dc184-0238-48f1-a8a2-4476733f50d3",
"timestamp":1390569372641
}
]
}
],
"merge-audits":[
]
},
{
"addedAt":1390569372757,
"vid":196183,
"canonical-vid":196183,
"merged-vids":[
],
"portal-id":62515,
"is-contact":true,
"profile-token":"AO_T-mOq49asR9pF4P9paqXhVApLjs9CXDFqCFs4BL7Y5z7TRYRoSC9i8cXxGOdXZqC-3D1doXT5G-pmAG283AFo0BYY3D-1AV2VhwIlVZ3t1KF-6G7DBQw80lRqBjPbJhtLnY7U6rd-",
"profile-url":"https://app.hubspot.com/contacts/62515/lists/public/contact/_AO_T-mOq49asR9pF4P9paqXhVApLjs9CXDFqCFs4BL7Y5z7TRYRoSC9i8cXxGOdXZqC-3D1doXT5G-pmAG283AFo0BYY3D-1AV2VhwIlVZ3t1KF-6G7DBQw80lRqBjPbJhtLnY7U6rd-/",
"properties":{
"firstname":{
"value":"Eugene"
},
"lastmodifieddate":{
"value":"1429569256338"
},
"company":{
"value":""
},
"lastname":{
"value":"Klibanoff"
}
},
"form-submissions":[
],
"identity-profiles":[
{
"vid":196183,
"saved-at-timestamp":1390569372682,
"deleted-changed-timestamp":0,
"identities":[
{
"type":"EMAIL",
"value":"eklibanoff#incomm.com",
"timestamp":1390568722786
},
{
"type":"LEAD_GUID",
"value":"276f1a0f-ce8f-4069-9b7a-405f9e14971a",
"timestamp":1390569372674
}
]
}
],
"merge-audits":[
]
},
{
"addedAt":1390569372800,
"vid":196184,
"canonical-vid":196184,
"merged-vids":[
],
"portal-id":62515,
"is-contact":true,
"profile-token":"AO_T-mMay6vd3gbNXXOGGn7WYa4332kjWEY6hYvggd98z-MYeHHaXL8BqAHSmsGQ1VVuN9_JOUPlqQ5ZC4e0-fNjOqj-yNp23nsqldKBYY0WF-m5pgnOGEwXEV2eLNVJmFffQ0U3SXXL",
"profile-url":"https://app.hubspot.com/contacts/62515/lists/public/contact/_AO_T-mMay6vd3gbNXXOGGn7WYa4332kjWEY6hYvggd98z-MYeHHaXL8BqAHSmsGQ1VVuN9_JOUPlqQ5ZC4e0-fNjOqj-yNp23nsqldKBYY0WF-m5pgnOGEwXEV2eLNVJmFffQ0U3SXXL/",
"properties":{
"firstname":{
"value":"James C. & Brenda L."
},
"lastmodifieddate":{
"value":"1429569255451"
},
"company":{
"value":""
},
"lastname":{
"value":"Kellling"
}
},
"form-submissions":[
],
"identity-profiles":[
{
"vid":196184,
"saved-at-timestamp":1390569372744,
"deleted-changed-timestamp":0,
"identities":[
{
"type":"EMAIL",
"value":"jameskelling#bellsouth.net",
"timestamp":1390568911277
},
{
"type":"LEAD_GUID",
"value":"4b92ccc6-d777-4e3e-90d9-bc4722329c16",
"timestamp":1390569372738
}
]
}
],
"merge-audits":[
]
}
],
"has-more":true,
"vid-offset":196184
}
I'm trying to build a ClientDataSet that includes Company, FirstName, LastName and EMAIL
Can someone please view the content and identify the correct RootElement for me ?

Answer 1

There is no plug-and-play way for this kind of data structure to map inside a TClientDataSet.
The mapping can be done by TRESTResponseDataSetAdapter on an array of objects like this
[
{
"firstname": "John",
"lastname": "Doe",
"email": "john#doe.com"
},
{
"firstname": "Jane",
"lastname": "Doe",
"email": "jane#doe.com"
}
]
or even nested
{
"contacts": [
{
"firstname": "John",
"lastname": "Doe",
"email": "john#doe.com"
},
{
"firstname": "Jane",
"lastname": "Doe",
"email": "jane#doe.com"
}
]
}
when you set the RootElement property to contacts.
But not with this kind of nested structure you are getting from your REST API.
You have to know the structure and map that by hand