Repository: govuk-polling-dataform

Dataform configuration for polling data modeling pipeline

• GitHub: govuk-polling-dataform
• Ownership: #data-engineering
• Category: Data engineering
• Links:
  • Sentry (error tracking)

README

The dataform configuration for modelling GOV.UK polling data. The output tables are made available in BigQuery and Looker.

Nomenclature

TBC

Technical documentation

Data Model

erDiagram
    survey_waves {
        STRING survey_wave_id PK
        STRING name
        STRING provider
        DATE start_date
        DATE end_date
    }

    survey_responses {
        STRING survey_response_id PK
        STRING survey_wave_id FK
        STRING src_response_id
        FLOAT weight
        INTEGER imd_quartile_country
        STRING gender
        STRING age_group
        STRING qualification
        STRING ethnicity
        STRING government_office_region
        STRING is_english_main_language
    }

    question_responses {
        STRING question_response_id PK
        STRING survey_response_id FK
        STRING question_id FK
    }

    questions {
        STRING question_id PK
        STRING src_question_id
        STRING question_group_text
        STRING question_text
        STRING question_type
    }

    question_response_choices {
        STRING question_choice_id PK
        STRING question_id FK
        STRING choice_value
        STRING choice_text
    }

    question_response_selections {
        STRING question_response_selection_id PK
        STRING question_response_id FK
        STRING selection_text
    }

    survey_wave_questions {
        STRING survey_wave_question_id PK
        STRING survey_wave_id FK
        STRING question_id FK
    }

    survey_waves ||--o{ survey_responses : ""
    survey_responses ||--o{ question_responses : ""
    question_responses ||--o{ question_response_selections : ""
    questions ||--o{ question_responses : ""
    questions ||--o{ survey_wave_questions : ""
    survey_waves ||--o{ survey_wave_questions : ""
    questions ||--o{ question_response_choices : "has a lookup of"

    %% Styling for the question_response_choices table
    style question_response_choices fill:#F9F2B2

Development

Adding a new Wave

1. Create a new row in definitions/lookups/lookup_survey_waves.sqlx.
2. Upload the source CSV to the govuk_polling_responses dataset with the name src_{provider}_wave_{number}. For example, src_bmg_wave_13.
3. For each question, add a new row in the definitions/lookups/lookup_survey_wave_questions.sqlx file including the wave_name and src_question_id. If this wave has the same questions as previous waves, just copy and paste being sure to update the values in wave_name.
4. Execute the workflow to ensure survey_wave_questions is populated as expected.

Adding a new Question

1. Create a new row in definitions/lookups/lookup_questions.sqlx.
2. Create a new row in definitions/lookups/lookup_question_response_choices.sqlx using the corresponding src_question_id. You’ll need to know the name of the column in the source data which contains the values along with the coded values and the associated selection text.
3. Execute the workflow and inspect the output of the question_response_choices table in BigQuery.
4. Add the column which contains the coded values to the UNPIVOT code in definitions/staging/stg_unpack_question_responses.sqlx.

Deployment

Once you PR is reviewed and approved, merge into main.

The production release configuration is based on main and will compile once a day. To manually compile, go to Release Configurations. Then select the production configuration and select New compliation which will sync to the latest changes on main branch. Then, go back to the “Releases & Scheduling” section and choose Start Execution.

Licence

LICENCE