What the data for this category looks like
Market data for coal chemical products comes primarily from domestic coal chemical spot trading platforms, futures exchange listed contract market data, and industry association survey data. Update schedules:
- Spot products update the daily closing benchmark price after market close
- Futures products update real-time latest quotes during trading hours
- Industry operating rate and inventory data updates every ten days
Each market data document includes fields such as category name, daily benchmark price, previous day's benchmark price, daily highest/lowest transaction price, regional pickup price range, operating rate, and total inventory. Units: Benchmark price, transaction price, and total inventory use yuan/ton or ton. Operating rate is recorded as a proportional value.
What constraints do these characteristics impose on forms and interactions
Multiple update schedules create interaction constraints:
- The system must support switching data pull logic by daily, real-time, and ten-day dimensions
- Real-time data requires a scheduled refresh configuration
- Daily and ten-day data only needs to sync at update nodes
The multi-category, multi-field structure requires the form to support dynamic field filtering. A dedicated coal chemical category list must be preset as a dropdown option to avoid interference from generic categories. Differences in fields across data sources (for example, futures include open interest while spot does not) require the form to automatically show or hide corresponding fields based on the selected data source. It also requires unified unit display rules to prevent mixing different units.
How to set the configurations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
formFields | Configure "Coal Chemical Category Name, Daily Benchmark Price, Regional Pickup Price Range, Operating Rate" as optional filter fields | Matches the core fields of coal chemical market data, covers high-frequency user query needs |
refreshInterval | 300 seconds (real-time data sources), 86400 seconds (daily data sources) | Matches the update schedule of coal chemical spot/futures data, avoids invalid refreshes or data lag |
datasourceSwitch | Enabled | Supports switching between futures and spot data sources, adapts to query needs for different trading scenarios |
selectOptionMaxCount | Top 15 mainstream coal chemical categories | Controls dropdown list length, avoids redundant interactions, prioritizes coverage of mainstream categories |
requiredFormFields | Set "Coal Chemical Category Name" as required | Ensures complete query conditions, avoids returning meaningless empty results |
invalidParamHandler | Return preset prompt text when an InvalidParameter error is triggered | Matches parameter error scenarios reported by the community, clearly informs users of the cause of parameter exceptions |
The parameter values provided on this page are common recommended starting points for defining configurations. Actual values are affected by material form, data volume, and business rules. Specific issues require case-by-case analysis. It is recommended to test on your own samples before finalizing settings.
Three common mistakes
- Phenomenon: Non-coal chemical generic parameters are mixed into configured form fields, and an
InvalidParametererror is returned after submitting a query. Cause: The field structure of coal chemical data is not strictly matched, and unrecognized parameter names are passed to the platform. - Phenomenon: The data source switch configuration is not enabled, and users cannot switch between futures and spot data sources during conversations. Cause: The
datasourceSwitchconfiguration item is not enabled, and no corresponding interaction options are added, limiting adaptability to query scenarios. - Phenomenon: Enabling form field split configuration triggers an
Invalid array lengtherror. Cause: No split rules for form fields are configured, resulting in an empty field array or non-compliant format.
How to confirm the configuration is correct
- The form preview interface is accessed, and the categories in the dropdown list are verified to be the preset dedicated coal chemical categories, with no unrelated fields mixed in.
- Data source options are manually switched, and confirmation is made that market data for the corresponding data source loads normally with no errors returned.
- A query request that only selects the required category is submitted, and confirmation is made that the returned results include core fields with no parameter error prompts.
- The refresh interval configuration is modified, and confirmation is made that the data update schedule matches the update frequency of the selected data source.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.