Actually, I want to convert json to csv it's working fine for flat structure.

But when it's coming to Nested JSON structure with arrays and hashes. It not working.

The json file is valid.

Please can you help me.

Can't convert arrays in .json file, I guess

using C:\RubyLearnToProgram>json2csv convert sample.json
results in following error:

Converting sample.json
error: undefined method `keys' for "PREPARED":String

The sample.json:
{
"preparationState": "PREPARED",
"consumerUsageStorageInstruction": {
"de": "gebruik",
"fr": "gebruik",
"en": "gebruik"
},
"npc": "1234",
"drainedWeight": "320.0GR",
"isBaseUnit": "true",
"packagingMarkedExpirationDateType": "BEST_BEFORE_DATE",
"numberOfServingsPerPackage": "100",
"functionalName": "Babbelaars",
"preparationInstructions": {
"de": "koken",
"fr": "koken",
"en": "koken"
},
"brandName": "Test lets try this one",
"manufacturerGln": "5060263871002",
"packagingRefuseObligationName": "ARA",
"gln": "5060263871002",
"height": "129.0MM",
"percentageOfAlcoholByVolume": "0.0",
"dailyValueIntakeReference": "10 a day keeps the doctor away",
"allergenStatement": {
"de": "Enthalt: Milch (Laktose)",
"fr": "Contient: lait de vache (lactose)",
"en": "Bevat: koemelk (lactose)"
},
"isPackagingMarkedReturnable": "false",
"netContent": "325.0GR",
"regulatedProductName": "Babbelaars",
"itemThumbnail": "/a/16257a91e7c42b64fdc7ad91292dce85/babbelaars.png",
"packages": [
{
"height": "100.0CM",
"containedGtin": "90000000000003",
"gtin": "91000000000002",
"width": "50.0CM",
"netContent": "100.0EA",
"packageUnitIndicator": "CASE",
"depth": "60.0CM",
"containedAmount": "10",
"grossWeight": "109.0KG"
}
],
"isVariableUnit": "false",
"taxRate": "STANDARD",
"width": "67.0MM",
"targetMarket": "528",
"gpc": "10000005",
"nameOfInformationProvider": "LANSA",
"depth": "67.0MM",
"grossWeight": "350.0GR",
"nutrients": [{
"percentageOfDailyValueIntake":"0.1","measurementPrecision":"APPROXIMATELY","quantityContainedServingSize":"1.0","quantityContainedHouseHoldServingSize":"10.0","quantityContainedUnit":"GR","nutrientTypeCode":"CHOAVL-"
},{
"percentageOfDailyValueIntake":"0.2","measurementPrecision":"APPROXIMATELY","quantityContainedServingSize":"2.0","quantityContainedHouseHoldServingSize":"20.0","quantityContainedUnit":"E14","nutrientTypeCode":"ENER-"
},{
"percentageOfDailyValueIntake":"0.3","measurementPrecision":"APPROXIMATELY","quantityContainedServingSize":"3.0","quantityContainedHouseHoldServingSize":"30.0","quantityContainedUnit":"GR","nutrientTypeCode":"FASAT"
},{
"percentageOfDailyValueIntake":"0.4","measurementPrecision":"APPROXIMATELY","quantityContainedServingSize":"4.0","quantityContainedHouseHoldServingSize":"40.0","quantityContainedUnit":"KJO","nutrientTypeCode":"ENER-"
},{
"percentageOfDailyValueIntake":"0.5","measurementPrecision":"APPROXIMATELY","quantityContainedServingSize":"5.0","quantityContainedHouseHoldServingSize":"50.0","quantityContainedUnit":"GR","nutrientTypeCode":"FIBTG"
},{
"percentageOfDailyValueIntake":"0.6","measurementPrecision":"APPROXIMATELY","quantityContainedServingSize":"6.0","quantityContainedHouseHoldServingSize":"60.0","quantityContainedUnit":"GR","nutrientTypeCode":"PRO-"
},{
"percentageOfDailyValueIntake":"0.7","measurementPrecision":"APPROXIMATELY","quantityContainedServingSize":"7.0","quantityContainedHouseHoldServingSize":"70.0","quantityContainedUnit":"GR","nutrientTypeCode":"FAT"
},{
"percentageOfDailyValueIntake":"0.8","measurementPrecision":"APPROXIMATELY","quantityContainedServingSize":"8.0","quantityContainedHouseHoldServingSize":"80.0","quantityContainedUnit":"GR","nutrientTypeCode":"SUGAR-"
},{
"percentageOfDailyValueIntake":"0.9","measurementPrecision":"APPROXIMATELY","quantityContainedServingSize":"9.0","quantityContainedHouseHoldServingSize":"90.0","quantityContainedUnit":"GR","nutrientTypeCode":"SALTEQ"
}],
"ingredientStatement": {
"de": "Zucker, Glukosesirup, Zuckersirup, Butter (3%), Salz.",
"fr": "sucre, sirop de glucose, sirop de sucre, beurre (3%), sel.",
"en": "sugar, glucose syrup, sugar syrup, butter (3%), salt."
},
"isItemReturnable": "false",
"shortDescription": {
"en": "Babbelaars"
},
"allergens": [
{
"allergenTypeCode": "BB",
"levelOfContainment": "CONTAINS"
}
],
"contactName": "LANSAEU1169",
"startAvailabilityDate": "2015-05-19",
"myattribute": "MyPostedEach",
"minimumLifespanFromTimeOfArrival": "8",
"householdServingSize": "household serving size",
"isDispatchUnit": "false",
"isBasePriceDeclarationRelevant": "false",
"allergenSpecificationAgency": "EU",
"isOrderableUnit": "false",
"allergenSpecificationName": "1169/2011",
"additives": [
{
"additiveName": "additive sample name",
"levelOfContainment": "CONTAINS"
}
],
"minimumLifespanFromTimeOfProduction": "10",
"baseUnitIndicator": "BASE_UNIT_OR_EACH",
"effectiveDate": "2015-05-19",
"servingSize": "GR",
"countryOfOrigin": "528",
"preparationType": "PRESSURE_COOKING",
"supplierItemNumber": "324324234",
"gtin": "90000000000003",
"pallets": [
{
"palletTypeCode": "37",
"height": "10.0MR",
"optionalGtin": "92000000000001",
"containedGtin": "91000000000002",
"palletTermsAndConditions": "3",
"width": "250.0CM",
"quantityOfLayersPerPallet": "5",
"palletUnitIndicator": "PALLET",
"depth": "120.0CM",
"containedAmount": "50",
"grossWeight": "1200.0KG",
"logisticsUnitStackingFactor": "10"
}
],
"barCodeType": "EAN_UCC_13_SYMBOL",
"nameOfManufacturer": "LANSA",
"compulsoryAdditivesLabelInformation": {
"de": "comp add label",
"fr": "comp add label",
"en": "comp add label"
},
"isInvoiceUnit": "false",
"isConsumerUnit": "true",
"packagingTypeCode": "CAN",
"communicationAddress": "Leliehof 26, 4841 ML PRINSENBEEK",
"itemImage": "/a/d59455129b92fb21dd00a97746a81439/babbelaars.png",
"isPackagingExemptFromRefuseObligation": "NOT_APPLICABLE"
}

Could you help me with this, I'm trying to get all keys and nested keys to create a dynamic conversion of values. Thanks in advance, Greetings Danny

I'm trying to convert a facebook feed json file, but it keeps returning this error:
error: undefined method `keys' for #Array:0x000000028643c0

Error converting a JSON file. Thx!