text: allContentfulBlogPost(sort: { fields: [date], order: DESC }) {
      edges {
        node {
          slug // text pathタイプ
          date(formatString: "MMMM DD, YYYY")　// 日付
          title // sort text
          description // long text
          category { // relation category model
            name
          }
          avatar { // image
            fixed(width: 50, height: 50) {
              ...GatsbyContentfulFixed_tracedSVG
            }
          }
          cover { // image
            fluid(maxWidth: 1000, quality: 90) {
              ...GatsbyContentfulFluid_tracedSVG
            }
          }
          body { // rich text
            json // jsonで
          }
        }
      }
    }