Combine JSON objects in Ruby, and output to CSV - ruby

Question

Let's say I have two JSON objects (call them 'websites' and 'links'). I need to end up with both objects in a single CSV (ideally in separate columns).
I'm working with something like this:
File.open("file.json", "w") do |f|
combined = [websites, links]
f.write(JSON.pretty_generate(combined))
end
And then I'm using the Ruby gem json2csv to convert this file to a CSV. But when I do, I get the following error:
error: undefined method 'keys' for #<Array:0x007fea8a8e33f8>
I can't figure out what's wrong. When I look in file.json, it appears to be structured like this: [{websites}, {links}]. From my limited knowledge of JSON, I think that's right, but I could easily be wrong.
Also, I know this won't get me separate columns in the CSV. If anyone has an answer for that part, major bonus points.
EDIT: JSON examples included below; error message changed after minor fix on my end.
websites:
{
"uri": "https://v1/websites",
"id": 28235674,
"background": null,
"createdDate": 1399585684000,
"lastActivityDate": 1430682494000,
"lastCommunicationDate": 1430682494000,
"lastNonCommunicationChronicleDate": 1430330886000,
"lastModifiedDate": 1449263116000,
"lastViewedDate": 1421429034000,
"preferredContactType": null,
"rss": "",
"emailAddresses": [
{
"email": "",
"type": "Work"
},
{
"email": "",
"type": "Work"
},
{
"email": "",
"type": "Work"
},
{
"email": "not found",
"type": "Work"
}
],
"phoneNumbers": [
],
"streetAddresses": [
],
"socialNetworks": [
{
"profileUrl": "http://twitter.com",
"name": "Twitter"
},
{
"profileUrl": "http://www.facebook.com",
"name": "Facebook"
},
{
"profileUrl": "http://plus.google.com",
"name": "GooglePlus"
},
{
"profileUrl": "http://www.linkedin.com",
"name": "LinkedIn"
},
{
"profileUrl": "http://twitter.com",
"name": "Twitter"
}
],
"contactUrls": [
],
"tags": [
"tag1",
"tag2"
],
"mostRecentActivity": "https://v1/history",
"mostRecentChronicle": "https://v1/history",
"mostRecentCommunication": "https://v1/history",
"mostRecentNonCommunicationChronicle": "https://v1/history",
"projectStates": "https://v1/websites",
"history": "https://v1/history",
"customFieldValues": [
],
"name": "",
"primaryDomain": "",
"domains": [
""
],
"associatedPeople": "https://v1/people",
"payments": "https://payments",
"links": "https://v1/links",
"type": "https://v1/websites"
}
links:
{
"uri": "https://v1/links/custom_fields",
"id": 15529329,
"value": "Name",
"backgroundColor": null,
"customField": "https://v1/links/custom_fields"
}
combined output:
[
{
"uri": "https://v1/websites",
"id": 28235674,
"background": null,
"createdDate": 1399585684000,
"lastActivityDate": 1430682494000,
"lastCommunicationDate": 1430682494000,
"lastNonCommunicationChronicleDate": 1430330886000,
"lastModifiedDate": 1449263116000,
"lastViewedDate": 1421429034000,
"preferredContactType": null,
"rss": "",
"emailAddresses": [
{
"email": "",
"type": "Work"
},
{
"email": "",
"type": "Work"
},
{
"email": "",
"type": "Work"
},
{
"email": "not found",
"type": "Work"
}
],
"phoneNumbers": [
],
"streetAddresses": [
],
"socialNetworks": [
{
"profileUrl": "http://twitter.com/",
"name": "Twitter"
},
{
"profileUrl": "http://www.facebook.com",
"name": "Facebook"
},
{
"profileUrl": "http://plus.google.com",
"name": "GooglePlus"
},
{
"profileUrl": "http://www.linkedin.com/",
"name": "LinkedIn"
},
{
"profileUrl": "http://twitter.com/",
"name": "Twitter"
}
],
"contactUrls": [
],
"tags": [
"tag1",
"tag2"
],
"mostRecentActivity": "https://v1/history/",
"mostRecentChronicle": "https://v1/history/",
"mostRecentCommunication": "https://v1/history/",
"mostRecentNonCommunicationChronicle": "https://v1/history/",
"projectStates": "https://v1/websites/",
"history": "https://v1/history",
"customFieldValues": [
],
"name": "",
"primaryDomain": "",
"domains": [
""
],
"associatedPeople": "https://v1/people",
"links": "https://v1/links",
"type": "https://v1/websites"
},
{
"uri": "https://links/custom_fields",
"id": 15529329,
"value": "Name",
"backgroundColor": null,
"customField": "https://links/custom_fields"
}
]

Answer 1

JSON.pretty_generate() is expecting a hash and you are passing an array of 2 hashes. Start with: combined.map { |c| f.write(JSON.pretty_generate(c)) } and then mapping them into your CSV should be as easy as following the CSV documentation.