view by newspaper category with rails 4 - ruby-on-rails

Question

My problem is that I need to fill an array with rails 4 to display top 3 results categorized by newspaper
Category of newspaper is: 0,1,2,3 or other, is random.
parsed_json: Is one array with values de newspapers, after news_source fill with news from newspapers.
SQL: http://i.stack.imgur.com/dP8BM.png
With this code only the last value of the array of a newspaper.
def index
if get_api_key
#parsed_json = Array.new
#news_source = Array.new
#Trae todos los datos asociados a la llave
#emission = Emission.where(key: get_api_key)
#Envío de datos a json
#emission.each do |p|
#weather_now = WeatherNowUy.where(city: p.state)
#weather_next_days = WeatherNextDaysUy.where(city: p.state)
#parsed_json << JSON.parse(p.news_source)
end
#parsed_json.each do |u|
#news_source = NewsUy.where(newspaper: u).limit(3)
end
end
end
Example of return, no show by newspaper 1 is also found in the array parsed_json.
Not
"News": [
{
"title": "Con un gol de Tevez, Boca venció a Godoy Cruz 2-0 y sigue en lo más alto",
"description": "El delantero marcó de penal en la victoria en La Bombonera. Meli había abierto el marcador. Los \"Xeneizes\" comparten con San Lorenzo la primera posición.",
"newspaper": "0"
},
{
"title": "Barcelona picó en punta",
"description": "La primera fecha del fútbol español se terminará el lunes con el partido entre Granada y Eibar.",
"newspaper": "0"
},
{
"title": "Sampdoria, Chievo Verona y Fiorentina los líderes",
"description": "Este fin de semana se disputó la primera fecha de la serie A italiana.",
"newspaper": "0"
}
]
}

Answer 1

Change #news_source = NewsUy.where(newspaper: u).limit(3) to #news_source << NewsUy.where(newspaper: u).limit(3) in your last #parsed_json.each do loop. Because, if you use = operator, it will replace it every time with the next value and that's why you are getting only the last value. To get all the values, you need to accumulate those into the #news_source array using << operator.
So, you need this:
#parsed_json.each do |u|
#news_source << NewsUy.where(newspaper: u).limit(3)
end